Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Recurring Fair Value Inputs (Details)

v3.20.1
Fair Value Measurements - Recurring Fair Value Inputs (Details)
Mar. 31, 2020
USD ($)
$ / security
$ / MMBTU
year
Dec. 31, 2019
USD ($)
$ / security
$ / MMBTU
year
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Other assets, primarily auction rate securities $ 6,789,000,000 $ 15,518,000,000
Long-term debt (32,163,000,000) (34,975,000,000)
Recurring    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Other assets, primarily auction rate securities 6,789,000,000 15,518,000,000
MSRs 1,200,000,000 1,500,000,000
Long-term debt (32,163,000,000) (34,975,000,000)
Recurring | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Instruments backed by residential real estate assets 1,567,000,000 1,407,000,000
Instruments backed by commercial real estate assets 1,224,000,000 303,000,000
Commercial loans, debt securities and other 3,429,000,000 3,798,000,000
Other assets, primarily auction rate securities 1,960,000,000 2,360,000,000
MSRs 1,164,000,000 1,545,000,000
Long-term debt (721,000,000) (1,149,000,000)
Net derivative asset (liability) $ (2,909,000,000) $ (2,538,000,000)
Recurring | Level 3 | Yield | Minimum | Discounted cash flow, Market comparables    
Fair Value Inputs [Abstract]    
Instruments backed by residential real estate assets 0.00 0.00
Commercial loans, debt securities and other 0.01 0.01
Recurring | Level 3 | Yield | Minimum | Discounted cash flow    
Fair Value Inputs [Abstract]    
Instruments backed by commercial real estate assets 0.00 0.00
Recurring | Level 3 | Yield | Minimum | Discounted cash flow, Market comparables, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Long-term debt 0.02 0.02
Recurring | Level 3 | Yield | Maximum | Discounted cash flow, Market comparables    
Fair Value Inputs [Abstract]    
Instruments backed by residential real estate assets 0.25 0.25
Commercial loans, debt securities and other 0.25 0.20
Recurring | Level 3 | Yield | Maximum | Discounted cash flow    
Fair Value Inputs [Abstract]    
Instruments backed by commercial real estate assets 0.25 0.30
Recurring | Level 3 | Yield | Maximum | Discounted cash flow, Market comparables, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Long-term debt 0.07 0.06
Recurring | Level 3 | Yield | Weighted Average | Discounted cash flow, Market comparables    
Fair Value Inputs [Abstract]    
Instruments backed by residential real estate assets 0.07 0.06
Commercial loans, debt securities and other 0.07 0.06
Recurring | Level 3 | Yield | Weighted Average | Discounted cash flow    
Fair Value Inputs [Abstract]    
Instruments backed by commercial real estate assets 0.03 0.14
Recurring | Level 3 | Yield | Weighted Average | Discounted cash flow, Market comparables, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Long-term debt 0.07 0.05
Recurring | Level 3 | Prepayment speed | Minimum | Discounted cash flow, Market comparables    
Fair Value Inputs [Abstract]    
Instruments backed by residential real estate assets 0.01 0.01
Commercial loans, debt securities and other 0.10 0.10
Recurring | Level 3 | Prepayment speed | Maximum | Discounted cash flow, Market comparables    
Fair Value Inputs [Abstract]    
Instruments backed by residential real estate assets 0.32 0.27
Commercial loans, debt securities and other 0.20 0.20
Recurring | Level 3 | Prepayment speed | Weighted Average | Discounted cash flow, Market comparables    
Fair Value Inputs [Abstract]    
Instruments backed by residential real estate assets 0.21 0.17
Commercial loans, debt securities and other 0.15 0.13
Recurring | Level 3 | Default rate | Minimum | Discounted cash flow, Market comparables    
Fair Value Inputs [Abstract]    
Instruments backed by residential real estate assets 0.00 0.00
Commercial loans, debt securities and other 0.03 0.03
Recurring | Level 3 | Default rate | Maximum | Discounted cash flow, Market comparables    
Fair Value Inputs [Abstract]    
Instruments backed by residential real estate assets 0.03 0.03
Commercial loans, debt securities and other 0.04 0.04
Recurring | Level 3 | Default rate | Weighted Average | Discounted cash flow, Market comparables    
Fair Value Inputs [Abstract]    
Instruments backed by residential real estate assets 0.01 0.01
Commercial loans, debt securities and other 0.04 0.04
Recurring | Level 3 | Loss severity | Minimum | Discounted cash flow, Market comparables    
Fair Value Inputs [Abstract]    
Instruments backed by residential real estate assets 0.00 0.00
Commercial loans, debt securities and other 0.35 0.35
Recurring | Level 3 | Loss severity | Maximum | Discounted cash flow, Market comparables    
Fair Value Inputs [Abstract]    
Instruments backed by residential real estate assets 0.47 0.47
Commercial loans, debt securities and other 0.40 0.40
Recurring | Level 3 | Loss severity | Weighted Average | Discounted cash flow, Market comparables    
Fair Value Inputs [Abstract]    
Instruments backed by residential real estate assets 0.14 0.14
Commercial loans, debt securities and other 0.38 0.38
Recurring | Level 3 | Price | Minimum | Discounted cash flow, Market comparables    
Fair Value Inputs [Abstract]    
Instruments backed by residential real estate assets | $ / security 0 0
Commercial loans, debt securities and other 0 0
Other assets, primarily auction rate securities | $ / security 10 10
Recurring | Level 3 | Price | Minimum | Discounted cash flow    
Fair Value Inputs [Abstract]    
Instruments backed by commercial real estate assets | $ / security 0 0
Recurring | Level 3 | Price | Minimum | Discounted cash flow, Market comparables, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Long-term debt | $ / security 0 0
Recurring | Level 3 | Price | Maximum | Discounted cash flow, Market comparables    
Fair Value Inputs [Abstract]    
Instruments backed by residential real estate assets | $ / security 160 160
Commercial loans, debt securities and other 142 142
Other assets, primarily auction rate securities | $ / security 99 100
Recurring | Level 3 | Price | Maximum | Discounted cash flow    
Fair Value Inputs [Abstract]    
Instruments backed by commercial real estate assets | $ / security 103 100
Recurring | Level 3 | Price | Maximum | Discounted cash flow, Market comparables, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Long-term debt | $ / security 115 116
Recurring | Level 3 | Price | Weighted Average | Discounted cash flow, Market comparables    
Fair Value Inputs [Abstract]    
Instruments backed by residential real estate assets | $ / security 98 94
Commercial loans, debt securities and other | $ / security 68 72
Other assets, primarily auction rate securities | $ / security 95 96
Recurring | Level 3 | Price | Weighted Average | Discounted cash flow    
Fair Value Inputs [Abstract]    
Instruments backed by commercial real estate assets | $ / security 60 55
Recurring | Level 3 | Price | Weighted Average | Discounted cash flow, Market comparables, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Long-term debt | $ / security 74 74
Recurring | Level 3 | Weighted-average life, fixed rate | Minimum | Discounted cash flow    
Fair Value Inputs [Abstract]    
MSRs | year 0 0
Recurring | Level 3 | Weighted-average life, fixed rate | Maximum | Discounted cash flow    
Fair Value Inputs [Abstract]    
MSRs | year 14 14
Recurring | Level 3 | Weighted-average life, fixed rate | Weighted Average | Discounted cash flow    
Fair Value Inputs [Abstract]    
MSRs | year 4 5
Recurring | Level 3 | Weighted-average life, variable rate | Minimum | Discounted cash flow    
Fair Value Inputs [Abstract]    
MSRs | year 0 0
Recurring | Level 3 | Weighted-average life, variable rate | Maximum | Discounted cash flow    
Fair Value Inputs [Abstract]    
MSRs | year 9 9
Recurring | Level 3 | Weighted-average life, variable rate | Weighted Average | Discounted cash flow    
Fair Value Inputs [Abstract]    
MSRs | year 3 3
Recurring | Level 3 | Option-adjusted spread, fixed rate | Minimum | Discounted cash flow    
Fair Value Inputs [Abstract]    
MSRs 0.07 0.07
Recurring | Level 3 | Option-adjusted spread, fixed rate | Maximum | Discounted cash flow    
Fair Value Inputs [Abstract]    
MSRs 0.14 0.14
Recurring | Level 3 | Option-adjusted spread, fixed rate | Weighted Average | Discounted cash flow    
Fair Value Inputs [Abstract]    
MSRs 0.09 0.09
Recurring | Level 3 | Option-adjusted spread, variable rate | Minimum | Discounted cash flow    
Fair Value Inputs [Abstract]    
MSRs 0.09 0.09
Recurring | Level 3 | Option-adjusted spread, variable rate | Maximum | Discounted cash flow    
Fair Value Inputs [Abstract]    
MSRs 0.15 0.15
Recurring | Level 3 | Option-adjusted spread, variable rate | Weighted Average | Discounted cash flow    
Fair Value Inputs [Abstract]    
MSRs 0.11 0.11
Recurring | Level 3 | Equity correlation | Minimum | Discounted cash flow, Market comparables, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Long-term debt 0.06 0.09
Recurring | Level 3 | Equity correlation | Maximum | Discounted cash flow, Market comparables, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Long-term debt 1.00 1.00
Recurring | Level 3 | Equity correlation | Weighted Average | Discounted cash flow, Market comparables, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Long-term debt 0.68 0.63
Recurring | Level 3 | Long-dated equity volatilities | Discounted cash flow, Market comparables    
Fair Value Inputs [Abstract]    
Commercial loans, debt securities and other 0.78 0.35
Recurring | Level 3 | Long-dated equity volatilities | Minimum | Discounted cash flow, Market comparables, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Long-term debt 0.12 0.04
Recurring | Level 3 | Long-dated equity volatilities | Maximum | Discounted cash flow, Market comparables, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Long-term debt 2.90 1.01
Recurring | Level 3 | Long-dated equity volatilities | Weighted Average | Discounted cash flow, Market comparables, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Long-term debt 0.34 0.32
Recurring | Level 3 | Natural gas forward price | Minimum | Discounted cash flow, Market comparables, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Long-term debt | $ / MMBTU 1 1
Recurring | Level 3 | Natural gas forward price | Maximum | Discounted cash flow, Market comparables, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Long-term debt | $ / MMBTU 5 5
Recurring | Level 3 | Natural gas forward price | Weighted Average | Discounted cash flow, Market comparables, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Long-term debt | $ / MMBTU 3 3
Recurring | Level 3 | Credit derivatives    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Net derivative asset (liability) $ (12,000,000) $ 13,000,000
Recurring | Level 3 | Credit derivatives | Yield | Discounted cash flow, Stochastic recovery correlation model    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.05  
Recurring | Level 3 | Credit derivatives | Yield | Maximum | Discounted cash flow, Stochastic recovery correlation model    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities)   0.05
Recurring | Level 3 | Credit derivatives | Prepayment speed | Minimum | Discounted cash flow, Stochastic recovery correlation model    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.15 0.15
Recurring | Level 3 | Credit derivatives | Prepayment speed | Maximum | Discounted cash flow, Stochastic recovery correlation model    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 1.00 1.00
Recurring | Level 3 | Credit derivatives | Prepayment speed | Weighted Average | Discounted cash flow, Stochastic recovery correlation model    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.26 0.22
Recurring | Level 3 | Credit derivatives | Default rate | Discounted cash flow, Stochastic recovery correlation model    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.02  
Recurring | Level 3 | Credit derivatives | Default rate | Minimum | Discounted cash flow, Stochastic recovery correlation model    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities)   0.01
Recurring | Level 3 | Credit derivatives | Default rate | Maximum | Discounted cash flow, Stochastic recovery correlation model    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities)   0.04
Recurring | Level 3 | Credit derivatives | Default rate | Weighted Average | Discounted cash flow, Stochastic recovery correlation model    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities)   0.02
Recurring | Level 3 | Credit derivatives | Loss severity | Discounted cash flow, Stochastic recovery correlation model    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.00 0.35
Recurring | Level 3 | Credit derivatives | Price | Minimum | Discounted cash flow, Stochastic recovery correlation model    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) | $ / security 0 0
Recurring | Level 3 | Credit derivatives | Price | Maximum | Discounted cash flow, Stochastic recovery correlation model    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) | $ / security 122 104
Recurring | Level 3 | Credit derivatives | Price | Weighted Average | Discounted cash flow, Stochastic recovery correlation model    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) | $ / security 41 73
Recurring | Level 3 | Credit derivatives | Upfront points | Minimum | Discounted cash flow, Stochastic recovery correlation model    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0 0
Recurring | Level 3 | Credit derivatives | Upfront points | Maximum | Discounted cash flow, Stochastic recovery correlation model    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.0100 0.0100
Recurring | Level 3 | Credit derivatives | Upfront points | Weighted Average | Discounted cash flow, Stochastic recovery correlation model    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.0074 0.0063
Recurring | Level 3 | Equity contracts    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Net derivative asset (liability) $ (1,007,000,000) $ (1,081,000,000)
Recurring | Level 3 | Equity contracts | Equity correlation | Minimum | Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.06 0.09
Recurring | Level 3 | Equity contracts | Equity correlation | Maximum | Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 1.00 1.00
Recurring | Level 3 | Equity contracts | Equity correlation | Weighted Average | Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.68 0.63
Recurring | Level 3 | Equity contracts | Long-dated equity volatilities | Minimum | Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.12 0.04
Recurring | Level 3 | Equity contracts | Long-dated equity volatilities | Maximum | Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 2.90 1.01
Recurring | Level 3 | Equity contracts | Long-dated equity volatilities | Weighted Average | Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.34 0.32
Recurring | Level 3 | Commodity contracts    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Net derivative asset (liability) $ (1,725,000,000) $ (1,357,000,000)
Recurring | Level 3 | Commodity contracts | Natural gas forward price | Minimum | Discounted cash flow, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 1 1
Recurring | Level 3 | Commodity contracts | Natural gas forward price | Maximum | Discounted cash flow, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 5 5
Recurring | Level 3 | Commodity contracts | Natural gas forward price | Weighted Average | Discounted cash flow, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 2 3
Recurring | Level 3 | Commodity contracts | Correlation | Minimum | Discounted cash flow, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.54 0.30
Recurring | Level 3 | Commodity contracts | Correlation | Maximum | Discounted cash flow, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.73 0.69
Recurring | Level 3 | Commodity contracts | Correlation | Weighted Average | Discounted cash flow, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.73 0.68
Recurring | Level 3 | Commodity contracts | Volatilities | Minimum | Discounted cash flow, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.16 0.14
Recurring | Level 3 | Commodity contracts | Volatilities | Maximum | Discounted cash flow, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 2.93 0.54
Recurring | Level 3 | Commodity contracts | Volatilities | Weighted Average | Discounted cash flow, Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 1.19 0.27
Recurring | Level 3 | Interest rate contracts    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Net derivative asset (liability) $ (165,000,000) $ (113,000,000)
Recurring | Level 3 | Interest rate contracts | Correlation (IR/IR) | Minimum | Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.15 0.15
Recurring | Level 3 | Interest rate contracts | Correlation (IR/IR) | Maximum | Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.94 0.94
Recurring | Level 3 | Interest rate contracts | Correlation (IR/IR) | Weighted Average | Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.43 0.52
Recurring | Level 3 | Interest rate contracts | Correlation (FX/IR) | Minimum | Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.00 0.00
Recurring | Level 3 | Interest rate contracts | Correlation (FX/IR) | Maximum | Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.46 0.46
Recurring | Level 3 | Interest rate contracts | Correlation (FX/IR) | Weighted Average | Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.02 0.02
Recurring | Level 3 | Interest rate contracts | Long-dated inflation rates | Minimum | Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) (0.28) (0.23)
Recurring | Level 3 | Interest rate contracts | Long-dated inflation rates | Maximum | Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.59 0.56
Recurring | Level 3 | Interest rate contracts | Long-dated inflation rates | Weighted Average | Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.15 0.16
Recurring | Level 3 | Interest rate contracts | Long-dated inflation volatilities | Minimum | Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.00 0.00
Recurring | Level 3 | Interest rate contracts | Long-dated inflation volatilities | Maximum | Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.01 0.01
Recurring | Level 3 | Interest rate contracts | Long-dated inflation volatilities | Weighted Average | Industry standard derivative pricing    
Fair Value Inputs [Abstract]    
Net derivative assets (liabilities) 0.01 0.01
Recurring | Level 3 | Mortgage trading loans, ABS and other MBS    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Instruments backed by residential real estate assets $ 456,000,000 $ 332,000,000
Instruments backed by commercial real estate assets 172,000,000 85,000,000
Commercial loans, debt securities and other 1,105,000,000 1,136,000,000
Fair Value Inputs [Abstract]    
Loans and securities, fair value 1,700,000,000 1,600,000,000
Recurring | Level 3 | Other taxable securities    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Instruments backed by residential real estate assets 63,000,000  
Commercial loans, debt securities and other 5,000,000  
Recurring | Level 3 | Loans and leases    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Instruments backed by residential real estate assets 253,000,000 281,000,000
Commercial loans, debt securities and other 305,000,000 412,000,000
Fair Value Inputs [Abstract]    
Loans and securities, fair value 558,000,000 693,000,000
Recurring | Level 3 | Loans held-for-sale    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Instruments backed by residential real estate assets 1,000,000 4,000,000
Instruments backed by commercial real estate assets 802,000,000 17,000,000
Commercial loans, debt securities and other 274,000,000 354,000,000
Fair Value Inputs [Abstract]    
Loans and securities, fair value 1,100,000,000 375,000,000
Recurring | Level 3 | Available-for-sale debt securities    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Instruments backed by residential real estate assets 525,000,000 491,000,000
Fair Value Inputs [Abstract]    
Loans and securities, fair value 693,000,000 599,000,000
Recurring | Level 3 | Tax-exempt securities    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Commercial loans, debt securities and other 100,000,000 108,000,000
Recurring | Level 3 | Other debt securities    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Instruments backed by residential real estate assets 269,000,000 299,000,000
Fair Value Inputs [Abstract]    
Loans and securities, fair value 269,000,000 299,000,000
Recurring | Level 3 | Corporate securities, trading loans and other    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Instruments backed by commercial real estate assets 250,000,000 201,000,000
Commercial loans, debt securities and other 1,390,000,000 1,306,000,000
Fair Value Inputs [Abstract]    
Loans and securities, fair value 1,600,000,000 1,500,000,000
Recurring | Level 3 | Non-U.S. sovereign debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Commercial loans, debt securities and other 250,000,000 482,000,000
Fair Value Inputs [Abstract]    
Loans and securities, fair value 250,000,000 482,000,000
Recurring | Level 3 | Other assets, primarily auction rate securities    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Other assets, primarily auction rate securities 796,000,000 815,000,000
Recurring | Level 3 | Other Assets    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Other assets, primarily auction rate securities $ 2,000,000,000.0 $ 2,400,000,000