Background and Basis of Presentation (Share Repurchase Table) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Equity, Class of Treasury Stock [Line Items]
Aggregate cost of shares repurchased	$ 260	$ 368	$ 732	$ 1,451
January 2021 Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Total number of shares repurchased (shares)		8.5		29.9
Aggregate cost of shares repurchased		$ 368		$ 1,451
Average price per share of shares repurchased (usd per share)		$ 43.68		$ 48.60
January 2023 Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Total number of shares repurchased (shares)	5.9		16.3
Aggregate cost of shares repurchased	$ 260		$ 732
Average price per share of shares repurchased (usd per share)	$ 44.26		$ 44.97

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Number of shares that have been repurchased during the period and are being held in treasury.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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