Annual report pursuant to Section 13 and 15(d)

PENSION AND OTHER POSTRETIREMENT BENEFITS - COMPONENTS OF NET PERIODIC PENSION COST (Details 2)

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PENSION AND OTHER POSTRETIREMENT BENEFITS - COMPONENTS OF NET PERIODIC PENSION COST (Details 2) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Jan. 01, 2018
Pension Plan        
Changes in benefit obligations and plan assets recognized in other comprehensive income        
Amortization of prior service credit $ 0 $ 0 $ 1  
Recognized net actuarial loss (77) (44) (79)  
Incurred actuarial (gain) loss (40) 107 105  
Foreign exchange translation adjustments 30 (28) (7)  
Total recognized in other comprehensive income (87) 35 20  
Total recognized in net periodic pension cost and other comprehensive income (5) 77 83  
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year       $ 62
Other Postretirement Benefit Plan        
Components of Net Periodic Benefit Cost        
Interest cost 14 16 15  
Recognized net actuarial loss 6 5 5  
Net periodic pension cost 20 21 20  
Changes in benefit obligations and plan assets recognized in other comprehensive income        
Recognized net actuarial loss (6) (6) (5)  
Incurred actuarial (gain) loss (35) 9 6  
Total recognized in other comprehensive income (41) 3 1  
Total recognized in net periodic pension cost and other comprehensive income (21) 24 21  
UNITED STATES        
Pension and other postretirement benefits        
Defined Benefit Plan, Accumulated Benefit Obligation 2,745 2,625    
Plans with accumulated benefit obligation in excess of plan assets:        
Accumulated benefit obligation 323 304    
Plans with projected benefit obligation in excess of plan assets:        
Projected benefit obligation 344 339    
UNITED STATES | Pension Plan        
Components of Net Periodic Benefit Cost        
Service cost 107 90 80  
Interest cost 106 109 102  
Expected return on plan assets (204) (201) (189)  
Amortization of prior service cost 0 0 (1)  
Recognized net actuarial loss 37 29 45  
Net periodic pension cost 46 27 37  
Changes in benefit obligations and plan assets recognized in other comprehensive income        
Foreign exchange translation adjustments 0 0    
UNITED KINGDOM        
Pension and other postretirement benefits        
Defined Benefit Plan, Accumulated Benefit Obligation 1,569 1,366    
UNITED KINGDOM | Pension Plan        
Components of Net Periodic Benefit Cost        
Service cost 26 21 27  
Interest cost 40 50 56  
Expected return on plan assets (70) (71) (91)  
Amortization of prior service cost 0 0 0  
Recognized net actuarial loss 40 15 34  
Net periodic pension cost 36 15 $ 26  
Changes in benefit obligations and plan assets recognized in other comprehensive income        
Foreign exchange translation adjustments $ (174) $ 334    
Scenario, Forecast | Other Postretirement Benefit Plan        
Changes in benefit obligations and plan assets recognized in other comprehensive income        
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year       $ 0