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 |