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Contract Assets and Liabilities (Narrative) (Details) - USD ($)
$ in Billions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Revenue from Contract with Customer [Abstract]          
Increase in contract assets     $ 2.0    
Increase in contract liabilities     1.5    
Revenue recognized related to contract liabilities outstanding at the beginning of the year $ 1.5 $ 1.3 6.5 $ 5.7  
Allowance for expected credit losses on contract assets $ 0.7   $ 0.7   $ 0.5