Divestitures - Schedule of Assets and Liabilities Held for Sale (Details) - HHS Business - Discontinued Operations, Disposed of by Sale $ in Millions	Dec. 31, 2020 USD ($)
Assets:
Cash and cash equivalents	$ 8
Accounts receivable, net	295
Prepaid expenses	39
Other current assets	2
Total current assets	344
Intangible assets, net	1,308
Operating right-of-use assets, net	74
Goodwill	1,354
Property and equipment, net	46
Other assets	54
Total non-current assets	2,836
Total assets	3,180
Liabilities:
Accounts payable	79
Accrued payroll and related costs	13
Current operating lease liabilities	27
Accrued expenses and other current liabilities	36
Deferred revenue and advance contract payments	20
Total current liabilities	175
Non-current deferred revenue	32
Long-term operating lease liabilities	48
Other long term liabilities	2
Total long-term liabilities	82
Total liabilities	$ 257