Income Taxes - Reconciliation of unrecognized tax benefits (UTB) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Federal, State and Foreign Tax
Gross UTB Balance, beginning balance	$ 590	$ 632	$ 770
Additions based on tax positions related to the current year	13	11	114
Additions for tax positions of prior years	57	63	36
Reductions for tax positions of prior years	(16)	(42)	(132)
Settlements	(17)	(33)	(118)
Reductions due to lapse of applicable statute of limitations	(36)	(42)	(32)
Foreign currency translation	(17)		(6)
Foreign currency translation		1
Gross UTB Balance, ending balance	$ 574	$ 590	$ 632

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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-Topic 740
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-Name Accounting Standards Codification
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Amount of decrease in unrecognized tax benefits resulting from foreign currency translation.

+ 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 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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