Leases - ROU Assets and Lease Liabilities (Details) - USD ($) $ in Millions |
Dec. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Lessee, Lease, Description [Line Items] | ||
| Lease liabilities - short-term debt | $ 36 | $ 30 |
| Finance Lease, Liability, Current, Statement of Financial Position | Short-term debt (Note J&Q) | Short-term debt (Note J&Q) |
| Lease liabilities - long-term debt | $ 63 | $ 60 |
| Finance Lease, Liability, Noncurrent, Statement of Financial Position | Long-term debt (Note J&Q) | Long-term debt (Note J&Q) |
| Property, plant and equipment | ||
| Lessee, Lease, Description [Line Items] | ||
| ROU assets | $ 86 | $ 84 |