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Revenue Recognition - Operating Lease Revenue (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Revenue from Contract with Customer [Abstract]        
Lease income $ 66 $ 67 $ 205 $ 209
Percent of operating revenue 6.00% 5.00% 6.00% 5.00%