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Pension and Postretirement Benefit Plans - Reconciliations of Changes in Benefit Obligations, Plan Assets and Funded Status (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Reconciliation of fair value of plan assets [Roll Forward]:      
Fair value at beginning of period $ 1,533    
Fair value at end of period 1,505 $ 1,533  
United States Pension Plan of US Entity [Member]      
Reconciliation of benefit obligation [Roll Forward]:      
Obligation at beginning of period 1,692 1,823  
Interest cost 53 66 $ 80
Service cost
Actuarial (gain) loss 59 (70)  
Benefit payments (122) (127)  
New plans  
Settlements (133)
Other  
Translation adjustments  
Obligation at end of period 1,682 1,692 1,823
Reconciliation of fair value of plan assets [Roll Forward]:      
Fair value at beginning of period 1,493 1,622  
Actual return on plan assets 83 (2)  
Employer contributions  
Benefit payments (122) (127)  
Settlements (133)
Translation adjustments  
Fair value at end of period 1,454 1,493 1,622
Funded status at end of period (228) (199)  
Foreign Pension Plan [Member]      
Reconciliation of benefit obligation [Roll Forward]:      
Obligation at beginning of period 288 325  
Interest cost 7 8 11
Service cost 5 5 6
Actuarial (gain) loss 18 (5)  
Benefit payments (12) (11)  
New plans 14 4  
Settlements (2) (2)  
Other (5)  
Translation adjustments (4) (36)  
Obligation at end of period 309 288 325
Reconciliation of fair value of plan assets [Roll Forward]:      
Fair value at beginning of period 40 44  
Actual return on plan assets 4 3  
Employer contributions 15 12  
Benefit payments (12) (11)  
Settlements (2) (2)  
New plans 4 3  
Translation adjustments 2 (9)  
Fair value at end of period 51 40 44
Funded status at end of period (258) (248)  
Foreign Postretirement Benefit Plan [Member]      
Reconciliation of benefit obligation [Roll Forward]:      
Obligation at beginning of period 86 110  
Interest cost 3 3 5
Service cost 1 1 1
Actuarial (gain) loss 4 (6)  
Benefit payments (5) (5)  
New plans  
Settlements  
Other  
Translation adjustments 2 (17)  
Obligation at end of period 91 86 110
Reconciliation of fair value of plan assets [Roll Forward]:      
Fair value at beginning of period 0 0  
Actual return on plan assets  
Employer contributions 5 5  
Benefit payments (5) (5)  
Settlements  
Translation adjustments  
Fair value at end of period 0 0 $ 0
Funded status at end of period $ (91) $ (86)