Other Financial Information (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid expenses	$ 114	$ 123
Contract assets	6	6
Other	23	25
Total other current assets	232	244
Contract fulfillment costs
Prepaid Expense and Other Assets, Current [Abstract]
Contract costs	49	50
Contract acquisition costs
Prepaid Expense and Other Assets, Current [Abstract]
Contract costs	$ 40	$ 40