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(Changes In Postretirement Benefit Obligation, Plan Assets, Funded Status And Amounts Recognized In Balance Sheet And Accumulated Other Comprehensive (Loss) Income) (Details) - Other Postretirement Benefits Plan [Member] - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
U.S. Plans      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation, January 1 $ 214 $ 213  
Service cost 0 0 $ 1
Interest cost 7 8 8
Participants’ contributions 3 4  
Actuarial (gain) loss 4 20  
Benefits paid (28) (32)  
Less: Federal subsidy 1 1  
Divestitures 0 0  
Currency Impact 0 0  
Benefit obligation, December 31 201 214 213
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets, January 1 0 0  
Company contributions 25 28  
Participants’ contributions 3 4  
Benefits paid (28) (32)  
Fair value of plan assets, December 31 0 0 0
Funded status, December 31 (201) (214)  
Current liability (18) (21)  
Non-current liability (183) (193)  
Amounts recognized in the consolidated balance sheet (201) (214)  
Net actuarial loss (gain) 46 47  
Prior service credit 0 (2)  
Amounts recognized in accumulated other comprehensive income (pre-tax) 46 45  
Non-U.S. Plans      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation, January 1 31 24  
Service cost 0 1 0
Interest cost 2 1 2
Participants’ contributions 0 0  
Actuarial (gain) loss 1 8  
Benefits paid (1) (2)  
Less: Federal subsidy 0 0  
Divestitures (7) 0  
Currency Impact (6) (1)  
Benefit obligation, December 31 20 31 24
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets, January 1 0 0  
Company contributions 1 2  
Participants’ contributions 0 0  
Benefits paid (1) (2)  
Fair value of plan assets, December 31 0 0 $ 0
Funded status, December 31 (20) (31)  
Current liability 0 (1)  
Non-current liability (20) (30)  
Amounts recognized in the consolidated balance sheet (20) (31)  
Net actuarial loss (gain) 12 19  
Prior service credit (12) (18)  
Amounts recognized in accumulated other comprehensive income (pre-tax) $ 0 $ 1