Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Components of Net Periodic Benefit Cost (Details)

v3.8.0.1
Employee Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
U.S. | Postretirement Health and Life Plans      
Components of net periodic benefit cost (income)      
Service cost $ 6 $ 7 $ 8
Interest cost 43 47 48
Expected return on plan assets 0 0 (1)
Amortization of net actuarial loss (gain) (21) (81) (46)
Other 4 4 4
Net periodic benefit cost (income) $ 32 $ (23) $ 13
Weighted-average assumptions used to determine net cost for years ended December 31      
Discount rate 3.99% 4.32% 3.75%
Expected return on plan assets     6.00%
Non-U.S. | Pension Plan      
Components of net periodic benefit cost (income)      
Service cost $ 24 $ 25 $ 27
Interest cost 72 86 93
Expected return on plan assets (136) (123) (133)
Amortization of net actuarial loss (gain) 8 6 6
Other (7) 2 1
Net periodic benefit cost (income) $ (39) $ (4) $ (6)
Weighted-average assumptions used to determine net cost for years ended December 31      
Discount rate 2.56% 3.59% 3.56%
Expected return on plan assets 4.73% 4.84% 5.27%
Rate of compensation increase 4.51% 4.67% 4.70%
Qualified | U.S. | Pension Plan      
Components of net periodic benefit cost (income)      
Service cost $ 0 $ 0 $ 0
Interest cost 606 634 621
Expected return on plan assets (1,068) (1,038) (1,045)
Amortization of net actuarial loss (gain) 154 139 170
Other 0 0 0
Net periodic benefit cost (income) $ (308) $ (265) $ (254)
Weighted-average assumptions used to determine net cost for years ended December 31      
Discount rate 4.16% 4.51% 4.12%
Expected return on plan assets 6.00% 6.00% 6.00%
Nonqualified | U.S. | Other Pension Plan      
Components of net periodic benefit cost (income)      
Service cost $ 1 $ 0 $ 0
Interest cost 117 127 122
Expected return on plan assets (95) (101) (92)
Amortization of net actuarial loss (gain) 34 25 34
Other 0 3 0
Net periodic benefit cost (income) $ 57 $ 54 $ 64
Weighted-average assumptions used to determine net cost for years ended December 31      
Discount rate 4.01% 4.34% 3.80%
Expected return on plan assets 3.50% 3.66% 3.26%
Rate of compensation increase 4.00% 4.00% 4.00%