Other Financial Information - Other Current Assets, Net (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid expenses	$ 139	$ 108
Contract assets	10	10
Assets held for sale	23	23
Other	6	7
Total Other current assets, net	286	246
Contract fulfillment costs
Prepaid Expense and Other Assets, Current [Abstract]
Contract costs	66	57
Contract acquisition costs
Prepaid Expense and Other Assets, Current [Abstract]
Contract costs	$ 42	$ 41