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Revenue from Contracts with Customers - Schedule of Contract Assets Rollforward (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Capitalized Cost To Fulfill Customer Contracts        
Change in Capitalized Contract Costs        
Balance at beginning of period $ 273 $ 264 $ 424 $ 370
Additions 440 400 1,267 1,166
Amortization (392) (367) (1,384) (1,235)
Impairment 0 0 0 0
Foreign currency translation and other (1) 5 13 1
Balance at end of period 320 302 320 302
Capitalized Cost To Obtain Customer Contracts        
Change in Capitalized Contract Costs        
Balance at beginning of period 187 196 207 195
Additions 4 19 31 51
Amortization (1) (13) (54) (40)
Impairment 0 0 0 0
Foreign currency translation and other 0 0 6 (4)
Balance at end of period $ 190 $ 202 $ 190 $ 202