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Background and Basis of Presentation (Share Repurchase Table) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Aggregate cost of shares repurchased | $ 274 | $ 10 |  | $ 600 | $ 2,410
January 2025 Share Repurchase Program [Member] |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Total number of shares repurchased (shares) | 4.7 |  |  | 10.4 |
Aggregate cost of shares repurchased | $ 274 |  |  | $ 600 |
Average price of repurchased shares, per share (usd per share) | $ 58.63 |  |  | $ 57.71 |
January 2024 Share Repurchase Program [Member] |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Total number of shares repurchased (shares) |  | 7.6 |  |  | 54.1
Aggregate cost of shares repurchased |  | $ 370 |  |  | $ 2,410
Average price of repurchased shares, per share (usd per share) |  | $ 48.36 |  |  | $ 44.50
ASR Agreements [Member] |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Total number of shares repurchased (shares) |  | 7.4 | 46.5 |  | 53.9
Aggregate cost of shares repurchased |  |  | $ 2,040 |  |
Average price of repurchased shares, per share (usd per share) |  | $ 48.44 |  |  | $ 44.50

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