Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Pension and Postretirement Plans (Details)

v3.6.0.2
Employee Benefit Plans - Pension and Postretirement Plans (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2016
Dec. 31, 2015
Change in fair value of plan assets          
Fair value, January 1 $ 23,505        
Fair value, December 31 23,772 $ 23,505      
Qualified Pension Plan          
Change in fair value of plan assets          
Fair value, January 1 17,962 18,614      
Actual return on plan assets 1,075 199      
Company contributions 0 0      
Plan participant contributions 0 0      
Settlements and curtailments 0 0      
Benefits paid (798) (851)      
Fair value, December 31 18,239 17,962 $ 18,614    
Change in projected benefit obligation          
Projected benefit obligation, January 1 14,461 15,508      
Service cost 0 0 0    
Interest cost 634 621 665    
Plan participant contributions 0 0      
Plan amendments 0 0      
Settlements and curtailments 0 0      
Actuarial loss (gain) 685 (817)      
Benefits paid (798) (851)      
Projected benefit obligation, December 31 14,982 14,461 15,508    
Amount recognized, December 31       $ 3,257 $ 3,501
Funded status, December 31          
Accumulated benefit obligation       14,982 14,461
Overfunded (unfunded) status of ABO       3,257 3,501
Provision for future salaries       0 0
Projected benefit obligation 14,461 15,508 15,508 $ 14,982 $ 14,461
Weighted-average assumptions, December 31          
Discount rate       4.16% 4.51%
Non-U.S. Pension Plans          
Change in fair value of plan assets          
Fair value, January 1 2,738 2,564      
Actual return on plan assets 541 342      
Company contributions 48 58      
Plan participant contributions 1 1      
Settlements and curtailments (20) (7)      
Benefits paid (118) (78)      
Foreign currency exchange rate changes (401) (142)      
Fair value, December 31 2,789 2,738 2,564    
Change in projected benefit obligation          
Projected benefit obligation, January 1 2,580 2,688      
Service cost 25 27 29    
Interest cost 86 93 109    
Plan participant contributions 1 1      
Plan amendments 0 (1)      
Settlements and curtailments (31) (7)      
Actuarial loss (gain) 535 (2)      
Benefits paid (118) (78)      
Foreign currency exchange rate changes (315) (141)      
Projected benefit obligation, December 31 2,763 2,580 2,688    
Amount recognized, December 31       $ 26 $ 158
Funded status, December 31          
Accumulated benefit obligation       2,645 2,479
Overfunded (unfunded) status of ABO       144 259
Provision for future salaries       118 101
Projected benefit obligation 2,580 2,688 2,688 $ 2,763 $ 2,580
Weighted-average assumptions, December 31          
Discount rate       2.56% 3.59%
Rate of compensation increase       4.51% 4.64%
Nonqualified and Other Pension Plans          
Change in fair value of plan assets          
Fair value, January 1 2,805 2,927      
Actual return on plan assets 74 14      
Company contributions 104 97      
Plan participant contributions 0 0      
Settlements and curtailments (6) 0      
Benefits paid (233) (233)      
Fair value, December 31 2,744 2,805 2,927    
Change in projected benefit obligation          
Projected benefit obligation, January 1 3,053 3,329      
Service cost 0 0 1    
Interest cost 127 122 133    
Plan participant contributions 0 0      
Plan amendments 0 0      
Settlements and curtailments (6) 0      
Actuarial loss (gain) 106 (165)      
Benefits paid (233) (233)      
Projected benefit obligation, December 31 3,047 3,053 3,329    
Amount recognized, December 31       $ (303) $ (248)
Funded status, December 31          
Accumulated benefit obligation       3,046 3,052
Overfunded (unfunded) status of ABO       (302) (247)
Provision for future salaries       1 1
Projected benefit obligation 3,053 3,329 3,329 $ 3,047 $ 3,053
Weighted-average assumptions, December 31          
Discount rate       4.01% 4.34%
Rate of compensation increase       4.00% 4.00%
Postretirement Health and Life Plans          
Change in fair value of plan assets          
Fair value, January 1 0 28      
Actual return on plan assets 0 0      
Company contributions 104 79      
Plan participant contributions 125 127      
Settlements and curtailments 0 0      
Benefits paid (242) (247)      
Federal subsidy on benefits paid 13 13      
Fair value, December 31 0 0 28    
Change in projected benefit obligation          
Projected benefit obligation, January 1 1,152 1,346      
Service cost 7 8 8    
Interest cost 47 48 58    
Plan participant contributions 125 127      
Plan amendments 0 0      
Settlements and curtailments 0 0      
Actuarial loss (gain) 25 (141)      
Benefits paid (242) (247)      
Federal subsidy on benefits paid 13 13      
Foreign currency exchange rate changes (2) (2)      
Projected benefit obligation, December 31 1,125 1,152 1,346    
Amount recognized, December 31       $ (1,125) $ (1,152)
Funded status, December 31          
Projected benefit obligation $ 1,152 $ 1,346 $ 1,346 $ 1,125 $ 1,152
Weighted-average assumptions, December 31          
Discount rate       3.99% 4.32%