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Employee Benefit Plans - ABO and PBO in Excess of Plan Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Non-U.S. Pension Plans    
Plans with PBO and ABO in Excess of Plan Assets    
PBO $ 574 $ 583
ABO 551 563
Fair value of plan assets 183 206
Nonqualified and Other Pension Plans    
Plans with PBO and ABO in Excess of Plan Assets    
PBO 1,075 1,190
ABO 1,074 1,190
Fair value of plan assets $ 1 $ 2