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Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Unrecognized Tax Benefits
Balance at beginning of period	$ 23	$ 21	$ 18
Reductions based on statute expirations	(5)	(5)	0
Audit settlement	(1)	0	0
Additions to state reserves for prior years	1	7	3
Balance at end of period	18	$ 23	$ 21
Other Disclosures
Amounts which, if recognized, would affect the effective tax rate	18
Increase in Unrecognized Tax Benefits is Reasonably Possible	$ 4

X

- Definition

Amount of increase reasonably possible in the next twelve months for the unrecognized tax benefit.

+ References

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- Definition

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

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- Definition

Amount of unrecognized tax benefits.

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

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

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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