XML 84 R72.htm IDEA: XBRL DOCUMENT v3.8.0.1
Pension and Other Postretirement Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Other Postretirement Benefit Plans    
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 14 $ 14
Interest cost 18 20
Expected return on plan assets (21) (19)
Amortization of unrecognized prior service credit (21) (25)
Termination benefits 1 1
Curtailments (4) (3)
Net periodic benefit cost (13) (12)
U.S. | Pension Plans    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 83 77
Interest cost 108 113
Expected return on plan assets (214) (218)
Amortization of unrecognized prior service credit (13) (13)
Net loss amortization 56 44
Termination benefits 11 5
Curtailments (2) 3
Settlements 1 0
Net periodic benefit cost 30 11
International | Pension Plans    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 67 61
Interest cost 46 41
Expected return on plan assets (113) (94)
Amortization of unrecognized prior service credit (3) (2)
Net loss amortization 21 23
Termination benefits 0 1
Curtailments 0 0
Settlements 0 0
Net periodic benefit cost $ 18 $ 30