Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating lease payments	$ 151	$ 139	$ 152
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$ 30	$ 117	$ 183