Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - ABO and PBO in Excess of Plan Assets (Details)

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Employee Benefit Plans - ABO and PBO in Excess of Plan Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Non-U.S. | Pension Plan    
Plans with PBO and ABO in Excess of Plan Assets    
PBO $ 671 $ 626
ABO 644 594
Fair value of plan assets 191 179
U.S. | Nonqualified | Other Pension Plan    
Plans with PBO and ABO in Excess of Plan Assets    
PBO 1,054 1,065
ABO 1,053 1,064
Fair value of plan assets $ 1 $ 1