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Employee Benefits - Overview of the accumulated benefit obligation, fair value of plan assets, funded status and net amount recognized for U.S. and Canadian Other Post-Retirement Benefits (Details) - Other Post-Retirement Benefits - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Accumulated projected benefit obligation $ 109 $ 117
Fair value of plan assets 17 17
Funded status (92) (100)
Unrecognized prior-service credit (1) (1)
Unrecognized loss 2 13
Net amount recognized $ (91) $ (88)