Leases - Schedule of Operating ROU Assets and Lease Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Total lease liabilities	$ 290	$ 273
Operating Lease, Right-of-Use Asset, Statement of Financial Position	us-gaap:OtherAssetsMember	us-gaap:OtherAssetsMember
Current lease liabilities, accrued expenses and other current liabilities	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent
Non-current lease liabilities, other liabilities	us-gaap:OtherLiabilitiesNoncurrent	us-gaap:OtherLiabilitiesNoncurrent
Total lease liabilities	us-gaap:OperatingLeaseLiability	us-gaap:OperatingLeaseLiability
Other assets
Lessee, Lease, Description [Line Items]
ROU assets	$ 243	$ 232
Accrued expenses and other current liabilities
Lessee, Lease, Description [Line Items]
Current lease liabilities	66	63
Other liabilities
Lessee, Lease, Description [Line Items]
Non-current lease liabilities	$ 224	$ 210