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Pensions Benefit Plans and Other Postretirement Benefits - Changes in Fair Value of Pension Plan Assets (Details) - Pension Benefit Plans - Funded Plan - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
U.S.    
Changes in fair value of pension plan assets    
Fair value at beginning of year $ 1,324 $ 1,215
Actual gain (loss) on plan assets 145 161
Benefit payments (76) (86)
Employer contributions 27 58
Settlements (252) (24)
Net change in fair value of assets (156) 109
Fair value at end of year 1,168 1,324
Non-U.S. Pension Plans    
Changes in fair value of pension plan assets    
Fair value at beginning of year 929 947
Actual gain (loss) on plan assets 7 99
Benefit payments (53) (51)
Employer contributions 57 45
Participant contributions 1 1
Settlements (8) (63)
Acquisitions (Divestitures)   (71)
Foreign currency translation (11) 23
Other 1 (1)
Net change in fair value of assets (6) (18)
Fair value at end of year $ 923 $ 929