Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Fair Value Measurements (Details)

v3.22.4
Employee Benefit Plans - Fair Value Measurements (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets $ 19,123 $ 26,096    
Level 1        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 10,194 13,521    
Level 2        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 8,508 11,932    
Level 3        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 421 643 $ 698 $ 644
Fair Value Measured at Net Asset Value Per Share        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 1,900 1,700    
Money market and interest-bearing cash        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 1,329 1,339    
Money market and interest-bearing cash | Level 1        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 1,329 1,339    
Money market and interest-bearing cash | Level 2        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 0 0    
Money market and interest-bearing cash | Level 3        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 0 0    
U.S. government and agency securities        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 4,022 5,888    
U.S. government and agency securities | Level 1        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 3,313 4,948    
U.S. government and agency securities | Level 2        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 704 934    
U.S. government and agency securities | Level 3        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 5 6 7 8
Corporate debt        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 3,587 4,900    
Corporate debt | Level 1        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 0 0    
Corporate debt | Level 2        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 3,587 4,900    
Corporate debt | Level 3        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 0 0    
Non-U.S. debt securities        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 1,260 2,090    
Non-U.S. debt securities | Level 1        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 327 925    
Non-U.S. debt securities | Level 2        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 933 1,165    
Non-U.S. debt securities | Level 3        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 0 0    
Asset-backed securities        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 1,273 1,485    
Asset-backed securities | Level 1        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 0 0    
Asset-backed securities | Level 2        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 1,273 1,485    
Asset-backed securities | Level 3        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 0 0    
Mutual and exchange-traded funds        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 1,247 1,395    
Mutual and exchange-traded funds | Level 1        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 1,247 1,395    
Mutual and exchange-traded funds | Level 2        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 0 0    
Mutual and exchange-traded funds | Level 3        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 0 0    
Collective investment funds        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 1,988 3,419    
Collective investment funds | Level 1        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 0 0    
Collective investment funds | Level 2        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 1,988 3,419    
Collective investment funds | Level 3        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 0 0    
Common and preferred stocks        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 3,901 4,826    
Common and preferred stocks | Level 1        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 3,901 4,826    
Common and preferred stocks | Level 2        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 0 0    
Common and preferred stocks | Level 3        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 0 0    
Real estate investment trusts        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 76 87    
Real estate investment trusts | Level 1        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 76 87    
Real estate investment trusts | Level 2        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 0 0    
Real estate investment trusts | Level 3        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 0 0    
Participant loans        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 6 7    
Participant loans | Level 1        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 0 0    
Participant loans | Level 2        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 0 0    
Participant loans | Level 3        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 6 7 7 8
Other investments        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 434 660    
Other investments | Level 1        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 1 1    
Other investments | Level 2        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 23 29    
Other investments | Level 3        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 410 630 $ 684 $ 628
Insurance Annuity Contracts        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets 390 612    
Other Various Investments        
Defined Benefit Plan Disclosure [Line Items]        
Fair value of plan assets $ 44 $ 48