Quarterly report pursuant to Section 13 or 15(d)

Derivatives - Designated Fair Value Hedged Assets (Liabilities) (Details)

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Derivatives - Designated Fair Value Hedged Assets (Liabilities) (Details)
$ in Millions
Sep. 30, 2018
USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Hedged liability, long-term debt, carrying value $ (137,610)
Hedged liability, long-term debt, cumulative fair value adjustments 1,839
Hedged asset, available-for-sale securities, carrying value 951
Hedged asset, available-for-sale securities, cumulative fair value adjustments (61)
Hedged asset, fair value hedge, amortized cost $ 948