Leases - Supplemental Consolidated Balance Sheet Information (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease right-of-use assets	$ 407	$ 574
Current lease liabilities, included within Accrued expenses and other current liabilities	$ 77	$ 126
Operating lease, liability, current, statement of financial position [Extensible List]	Accrued expenses and other current liabilities	Accrued expenses and other current liabilities
Long-term lease liabilities, included within Operating lease liabilities	$ 360	$ 513
Total operating lease liabilities	$ 437	$ 639
Weighted average remaining lease term	8 years 1 month 6 days	8 years 9 months 18 days
Weighted average discount rate	3.50%	3.60%