v3.3.1.900
Retirement Benefits Plans - Obligations and Funded Status (Details) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Funded status      
Fair value of plan assets $ 4,406 $ 4,621  
United States pension liabilities [Member]      
Funded status      
Fair value of plan assets 2,934 3,086 $ 2,940
Benefit obligations (3,829) (4,047) (3,625)
Funded status (895) (961)  
Amounts recognized in the Consolidated Balance Sheets      
Non-current assets 11 14  
Current liabilities (57) (16)  
Non-current liabilities (849) (959)  
Total (895) (961)  
Amounts recognized in Accumulated other comprehensive loss (pretax)      
Net actuarial loss 1,322 1,377  
Prior service cost (credit) 5 5  
Total 1,327 1,382 1,054
Non-United States pension liabilities [Member]      
Funded status      
Fair value of plan assets 1,472 1,535 1,432
Benefit obligations (2,175) (2,337) (2,127)
Funded status (703) (802)  
Amounts recognized in the Consolidated Balance Sheets      
Non-current assets 57 77  
Current liabilities (23) (26)  
Non-current liabilities (737) (853)  
Total (703) (802)  
Amounts recognized in Accumulated other comprehensive loss (pretax)      
Net actuarial loss 644 695  
Prior service cost (credit) 9 11  
Total 653 706 528
Other postretirement liabilities [Member]      
Funded status      
Fair value of plan assets 93 116 138
Benefit obligations (575) (676) (867)
Funded status (482) (560)  
Amounts recognized in the Consolidated Balance Sheets      
Non-current assets 0 0  
Current liabilities (42) (47)  
Non-current liabilities (440) (513)  
Total (482) (560)  
Amounts recognized in Accumulated other comprehensive loss (pretax)      
Net actuarial loss 95 176  
Prior service cost (credit) (74) (86)  
Total $ 21 $ 90 $ 184