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Stockholders' Equity (Summary of Purchases of Common Stock) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended					12 Months Ended
	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
5.0 Billion Dollar Share Repurchase Program Closed [Member]
Stockholders Equity [Line Items]
Total Number of Shares Purchased	8,505	7,653	6,675	5,188	4,428	23,944	19,350	11,708	13,983
Dollar Value of Shares Purchased	$ 301	$ 300	$ 295	$ 256	$ 193	$ 1,044	$ 992	$ 718	$ 589
Average Price Paid per Share	$ 35.33	$ 39.22	$ 44.23	$ 49.4	$ 43.47	$ 43.61	$ 51.23	$ 61.36	$ 42.15
Share Repurchase Program Open [Member]
Stockholders Equity [Line Items]
Total Number of Shares Purchased	77,490
Dollar Value of Shares Purchased	$ 3,644
Average Price Paid per Share	$ 47.02

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Number of shares that have been repurchased and retired during the period.

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Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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

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