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Accumulated Other Comprehensive Loss (Tables)
12 Months Ended
Dec. 31, 2021
Equity [Abstract]  
Accumulated Other Comprehensive Income (Loss) The components of Accumulated Other Comprehensive Loss at December 31, 2021 and 2020 consisted of the following (in millions):
Foreign Currency Translation AdjustmentOtherTotal
December 31, 2019$(3)$(2)$(5)
Other comprehensive loss before taxes(7)— (7)
Tax effects— — — 
Other comprehensive loss(7)— (7)
December 31, 2020(10)(2)(12)
Other comprehensive loss before taxes(1)— 
Tax effects
— — — 
Other comprehensive loss
(1)— 
December 31, 2021$(11)$(1)$(12)