Income Taxes (Changes in Liability for Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance of gross unrecognized tax benefits	$ 318	$ 275	$ 265
Increases: Positions taken during a current period	20
Increases: Acquired unrecognized tax benefits			8
Increases: Positions taken during a prior period	35	46	7
Decreases: Positions taken during a prior period			(2)
Decreases: Settlements with taxing authorities	(4)	(3)	(3)
Decreases: Reductions resulting from lapse of statue of limitations	(1)
Ending balance of gross unrecognized tax benefits	368	318	275
Favorable impact if recognized	$ 306	$ 258	$ 217

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.

+ References

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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 acquisitions.

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

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