Income and Other Taxes - Unrecognized Tax Benefits Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 115	$ 127	$ 108
Additions related to current year	7	3	42
Additions related to prior years positions	0	8	17
Reductions related to prior years positions	(14)	(10)	(36)
Settlements with taxing authorities	7
Settlements with taxing authorities		(8)	(1)
Reductions related to lapse of statute of limitations	(7)	(7)	(3)
Currency	(1)	2	0
Ending balance	107	115	127
Tax positions, highly certain of realizability but with uncertainty of timing	1	8	3
Accruals for payment of interest and penalties	$ 1	$ 4	$ 2

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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- Definition

Amount of unrecognized tax benefits.

+ References

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from foreign currency translation.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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The gross amount of unrecognized tax benefits for tax positions that are highly certain of realizability but for which there is uncertainty about the timing.

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No definition available.

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