Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Pension and Postretirement Plans (Details)

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Employee Benefit Plans - Pension and Postretirement Plans (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2019
Dec. 31, 2018
Change in fair value of plan assets          
Fair value, January 1 $ 23,475,000,000        
Fair value, December 31 25,836,000,000 $ 23,475,000,000      
U.S. | Other Pension Plan          
Change in fair value of plan assets          
Company contributions 0 0      
U.S. | Postretirement Health and Life Plans          
Change in fair value of plan assets          
Fair value, January 1 252,000,000 300,000,000      
Actual return on plan assets 5,000,000 5,000,000      
Company contributions 24,000,000 43,000,000      
Plan participant contributions 103,000,000 115,000,000      
Settlements and curtailments 0 0      
Benefits paid (185,000,000) (214,000,000)      
Federal subsidy on benefits paid 0 3,000,000      
Fair value, December 31 199,000,000 252,000,000 $ 300,000,000    
Change in projected benefit obligation          
Projected benefit obligation, January 1 928,000,000 1,056,000,000      
Service cost 5,000,000 6,000,000 6,000,000    
Interest cost 38,000,000 36,000,000 43,000,000    
Plan participant contributions 103,000,000 115,000,000      
Plan amendments 0 0      
Settlements and curtailments 0 0      
Actuarial loss (gain) 99,000,000 (73,000,000)      
Benefits paid (185,000,000) (214,000,000)      
Federal subsidy on benefits paid 0 3,000,000      
Foreign currency exchange rate changes 1,000,000 (1,000,000)      
Projected benefit obligation, December 31 989,000,000 928,000,000 1,056,000,000    
Amounts recognized on Consolidated Balance Sheet          
Other assets       $ 0 $ 0
Accrued expenses and other liabilities       (790,000,000) (676,000,000)
Net amount recognized, December 31       (790,000,000) (676,000,000)
Funded status, December 31          
Projected benefit obligation 989,000,000 1,056,000,000 1,056,000,000 $ 989,000,000 $ 928,000,000
Weighted-average assumptions, December 31          
Discount rate       3.27% 4.25%
U.S. | Qualified | Pension Plan          
Change in fair value of plan assets          
Fair value, January 1 18,178,000,000 19,708,000,000      
Actual return on plan assets 3,187,000,000 (550,000,000)      
Company contributions 0 0      
Plan participant contributions 0 0      
Settlements and curtailments 0 0      
Benefits paid (1,090,000,000) (980,000,000)      
Fair value, December 31 20,275,000,000 18,178,000,000 19,708,000,000    
Change in projected benefit obligation          
Projected benefit obligation, January 1 14,144,000,000 15,706,000,000      
Service cost 0 0 0    
Interest cost 593,000,000 563,000,000 606,000,000    
Plan participant contributions 0 0      
Plan amendments 0 0      
Settlements and curtailments 0 0      
Actuarial loss (gain) 1,714,000,000 (1,145,000,000)      
Benefits paid (1,090,000,000) (980,000,000)      
Projected benefit obligation, December 31 15,361,000,000 14,144,000,000 15,706,000,000    
Amounts recognized on Consolidated Balance Sheet          
Other assets       $ 4,914,000,000 $ 4,034,000,000
Accrued expenses and other liabilities       0 0
Net amount recognized, December 31       4,914,000,000 4,034,000,000
Funded status, December 31          
Accumulated benefit obligation       15,361,000,000 14,144,000,000
Overfunded (unfunded) status of ABO       4,914,000,000 4,034,000,000
Provision for future salaries       0 0
Projected benefit obligation 14,144,000,000 14,144,000,000 15,706,000,000 $ 15,361,000,000 $ 14,144,000,000
Weighted-average assumptions, December 31          
Discount rate       3.32% 4.32%
Interest-crediting rate       5.06% 5.18%
U.S. | Nonqualified | Other Pension Plan          
Change in fair value of plan assets          
Fair value, January 1 2,584,000,000 2,724,000,000      
Actual return on plan assets 228,000,000 8,000,000      
Company contributions 91,000,000 91,000,000      
Plan participant contributions 0 0      
Settlements and curtailments 0 0      
Benefits paid (237,000,000) (239,000,000)      
Fair value, December 31 2,666,000,000 2,584,000,000 2,724,000,000    
Change in projected benefit obligation          
Projected benefit obligation, January 1 2,779,000,000 3,047,000,000      
Service cost 1,000,000 1,000,000 1,000,000    
Interest cost 113,000,000 105,000,000 117,000,000    
Plan participant contributions 0 0      
Plan amendments 0 0      
Settlements and curtailments 0 0      
Actuarial loss (gain) 263,000,000 (135,000,000)      
Benefits paid (237,000,000) (239,000,000)      
Projected benefit obligation, December 31 2,919,000,000 2,779,000,000 3,047,000,000    
Amounts recognized on Consolidated Balance Sheet          
Other assets       $ 733,000,000 $ 754,000,000
Accrued expenses and other liabilities       (986,000,000) (949,000,000)
Net amount recognized, December 31       (253,000,000) (195,000,000)
Funded status, December 31          
Accumulated benefit obligation       2,919,000,000 2,778,000,000
Overfunded (unfunded) status of ABO       (253,000,000) (194,000,000)
Provision for future salaries       0 1,000,000
Projected benefit obligation 2,779,000,000 2,779,000,000 3,047,000,000 $ 2,919,000,000 $ 2,779,000,000
Weighted-average assumptions, December 31          
Discount rate       3.20% 4.26%
Rate of compensation increase       4.00% 4.00%
Interest-crediting rate       4.52% 4.50%
Non-U.S. | Pension Plan          
Change in fair value of plan assets          
Fair value, January 1 2,461,000,000 2,943,000,000      
Actual return on plan assets 273,000,000 (181,000,000)      
Company contributions 20,000,000 22,000,000      
Plan participant contributions 1,000,000 1,000,000      
Settlements and curtailments (42,000,000) (107,000,000)      
Benefits paid (108,000,000) (52,000,000)      
Foreign currency exchange rate changes 91,000,000 (165,000,000)      
Fair value, December 31 2,696,000,000 2,461,000,000 2,943,000,000    
Change in projected benefit obligation          
Projected benefit obligation, January 1 2,589,000,000 2,814,000,000      
Service cost 17,000,000 19,000,000 24,000,000    
Interest cost 65,000,000 65,000,000 72,000,000    
Plan participant contributions 1,000,000 1,000,000      
Plan amendments 2,000,000 13,000,000      
Settlements and curtailments (42,000,000) (107,000,000)      
Actuarial loss (gain) 288,000,000 (29,000,000)      
Benefits paid (108,000,000) (52,000,000)      
Foreign currency exchange rate changes 75,000,000 (135,000,000)      
Projected benefit obligation, December 31 2,887,000,000 2,589,000,000 2,814,000,000    
Amounts recognized on Consolidated Balance Sheet          
Other assets       $ 364,000,000 $ 316,000,000
Accrued expenses and other liabilities       (555,000,000) (444,000,000)
Net amount recognized, December 31       (191,000,000) (128,000,000)
Funded status, December 31          
Accumulated benefit obligation       2,841,000,000 2,542,000,000
Overfunded (unfunded) status of ABO       (145,000,000) (81,000,000)
Provision for future salaries       46,000,000 47,000,000
Projected benefit obligation $ 2,887,000,000 $ 2,814,000,000 $ 2,814,000,000 $ 2,887,000,000 $ 2,589,000,000
Weighted-average assumptions, December 31          
Discount rate       1.81% 2.60%
Rate of compensation increase       4.10% 4.49%
Interest-crediting rate       1.53% 1.47%