Other Financial Information (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid expenses	$ 110	$ 99
Contract assets	7	10
Other	17	2
Total other current assets	220	197
Other current assets excluded due to being classified as held for sale	54	56
Contract fulfillment costs
Prepaid Expense and Other Assets, Current [Abstract]
Contract costs	47	44
Contract acquisition costs
Prepaid Expense and Other Assets, Current [Abstract]
Contract costs	$ 39	$ 42