Leases - Amounts and Location of Operating Lease ROU Assets And Lease Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Assets and Liabilities, Lessee
Operating Lease - ROU Asset	$ 1,153	$ 1,101
Operating Lease, Assets (Balance Sheet Location)	Deferred income taxes and other assets	Deferred income taxes and other assets
Operating Lease Liability - Current	$ 245	$ 241
Operating Lease, Current Liabilities (Balance Sheet Location)	Other accrued liabilities	Other accrued liabilities
Operating Lease Liability - Non-Current	$ 956	$ 902
Operating Lease, Non-current Liabilities (Balance Sheet Location)	Post-employment Obligations, Deferred Income Taxes and Other Long-term Liabilities	Post-employment Obligations, Deferred Income Taxes and Other Long-term Liabilities
Present value of lease liabilities	$ 1,201	$ 1,143