v3.3.1.900
EMPLOYEE BENEFIT PLANS - CHANGES IN OBLIGATIONS, ASSETS AND FUNDED STATUS (DETAILS) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Pension Benefits      
Change in benefit obligations:      
Benefit obligation at the beginning of year $ 906 $ 755  
Service cost 35 30 $ 30
Interest cost 33 36 31
Plan curtailments (6)    
Actuarial (gain) loss, net (54) 138  
Employee contributions 6 4  
Plan settlements (6) (2)  
Benefits paid (30) (29)  
Expenses paid (3) (3)  
Impact of foreign exchange rates (17) (23)  
Benefit obligation at the end of year 864 906 755
Change in plan assets:      
Fair value of plan assets at the beginning of year 650 614  
Actual return on plan assets (3) 64  
Employer contributions 90 19  
Employee contributions 6 4  
Plan settlements (6) (2)  
Benefits paid (30) (29)  
Expenses paid (3) (3)  
Impact of foreign exchange rates (15) (17)  
Fair value of plan assets at the end of year 689 650 614
Funded (unfunded) status and net amounts recognized:      
Plan assets (less than) in excess of benefit obligation (175) (256)  
Net (liability) asset recognized in the balance sheet (175) (256)  
Amounts recognized in the balance sheet consist of:      
Non-current assets 12 12  
Current liabilities (5) (5)  
Non-current liabilities (182) (263)  
Net liability recognized (175) (256)  
Postretirement Benefits      
Change in benefit obligations:      
Benefit obligation at the beginning of year 69 69  
Interest cost 5 6 7
Plan curtailments   (3)  
Actuarial (gain) loss, net 8 11  
Employee contributions 1 1  
Benefits paid (8) (8)  
Impact of foreign exchange rates (19) (7)  
Benefit obligation at the end of year 56 69 $ 69
Change in plan assets:      
Employer contributions 7 7  
Employee contributions 1 1  
Benefits paid (8) (8)  
Funded (unfunded) status and net amounts recognized:      
Plan assets (less than) in excess of benefit obligation (56) (69)  
Net (liability) asset recognized in the balance sheet (56) (69)  
Amounts recognized in the balance sheet consist of:      
Current liabilities (6) (7)  
Non-current liabilities (50) (62)  
Net liability recognized $ (56) $ (69)