Income Taxes (Summary Of Changes In Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Changes in unrecognized income tax benefits
Balance, beginning of year	$ 260	$ 269	$ 194
Additions based on tax positions related to the current year	15	31	53
Additions for tax positions of prior years	65	22	65
Reductions for tax positions due to lapse of statutes of limitations	(15)	(15)	(43)
Reductions for tax positions of prior years	(6)	(33)	0
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	0	(14)	0
Balance, end of year	$ 319	$ 260	$ 269

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

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
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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 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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