XML 103 R86.htm IDEA: XBRL DOCUMENT v3.10.0.1
Share-based Compensation and Employee Benefits (Benefit Obligation, Plan Assets and Funded Status) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Pension Benefits [Member]      
Change in benefit obligation:      
Benefit obligation at beginning of period $ 2,982 $ 2,884  
Service cost 52 40 $ 36
Interest cost 84 88 89
Actuarial (gain) loss (172) 155  
Benefits paid (175) (180)  
Participant contributions 0 3  
Medicare Part D subsidy receipts 0 0  
Exchange rate changes 0 13  
Settlements 0 (21)  
Other (205) 0  
Benefit obligation at end of period 2,566 2,982 2,884
Change in plan assets:      
Fair value of plan assets at beginning of period 2,296 2,160  
Actual return on plan assets (128) 292  
Employer contributions 30 32  
Participant contributions 0 3  
Medicare Part D subsidy receipts 0 0  
Benefits paid (175) (180)  
Exchange rate changes 0 10  
Settlements 0 (21)  
Other (159) 0  
Fair value of plan assets at end of period 1,864 2,296 2,160
Funded status - net liability at December 31, (702) (686)  
OPEB [Member]      
Change in benefit obligation:      
Benefit obligation at beginning of period 425 473  
Service cost 1 1 1
Interest cost 12 13 16
Actuarial (gain) loss (53) (16)  
Benefits paid (33) (38)  
Participant contributions 1 2  
Medicare Part D subsidy receipts 1 1  
Exchange rate changes 0 1  
Settlements 0 0  
Other (15) (12)  
Benefit obligation at end of period 339 425 473
Change in plan assets:      
Fair value of plan assets at beginning of period 335 332  
Actual return on plan assets (5) 29  
Employer contributions 7 9  
Participant contributions 1 2  
Medicare Part D subsidy receipts 1 1  
Benefits paid (33) (38)  
Exchange rate changes 0 0  
Settlements 0 0  
Other 0 0  
Fair value of plan assets at end of period 306 335 $ 332
Funded status - net liability at December 31, $ (33) $ (90)