Other Financial Information (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid expenses	$ 117	$ 123
Contract assets	6	6
Other	12	25
Total other current assets	230	244
Contract fulfillment costs
Prepaid Expense and Other Assets, Current [Abstract]
Contract costs	56	50
Contract acquisition costs
Prepaid Expense and Other Assets, Current [Abstract]
Contract costs	$ 39	$ 40