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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 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Jun. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Equity, Class of Treasury Stock [Line Items]          
Aggregate cost of shares repurchased $ 112 $ 680   $ 712 $ 3,090
January 2025 Share Repurchase Program [Member]          
Equity, Class of Treasury Stock [Line Items]          
Total number of shares repurchased (shares) 1.9     12.3  
Aggregate cost of shares repurchased $ 112     $ 712  
Average price of repurchased shares, per share (usd per share) $ 60.13     $ 58.08  
January 2024 Share Repurchase Program [Member]          
Equity, Class of Treasury Stock [Line Items]          
Total number of shares repurchased (shares)   13.5     67.6
Aggregate cost of shares repurchased   $ 680     $ 3,090
Average price of repurchased shares, per share (usd per share)   $ 50.37     $ 45.68
ASR Agreements [Member]          
Equity, Class of Treasury Stock [Line Items]          
Total number of shares repurchased (shares)     53.9   53.9
Average price of repurchased shares, per share (usd per share)         $ 44.50