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Segment Information (Total Revenues of Reportable Segments) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Segment Reporting, Revenue Reconciling Item [Line Items]        
Revenues $ 6,204 $ 5,651 $ 17,063 $ 16,866