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Nature of Operations and Basis of Presentation - Narrative (Details)
$ in Millions
6 Months Ended
Jun. 30, 2024
USD ($)
segment
Dec. 31, 2023
USD ($)
Business Acquisition [Line Items]    
Number of reportable segments | segment 5  
Restricted cash $ 1 $ 1
Contract asset 83 75
Unearned revenue 2,400  
Capitalized contract costs $ 261 $ 234
Amortization period of capitalized contract cost 5 years  
OSTTRA | Corporate Joint Venture    
Business Acquisition [Line Items]    
Investment in joint venture percentage 50.00%  
Noncontrolling interest ownership by noncontrolling owners percentage 50.00%