Leases (Narrative) (Details) - USD ($) $ in Millions |
Dec. 31, 2023 |
Dec. 31, 2022 |
|---|---|---|
| Operating Leased Assets [Line Items] | ||
| Operating Lease, Right-of-Use Asset | $ 1,211 | $ 1,088 |
| Operating Lease, Liability, Current | 300 | 292 |
| Operating Lease, Liability, Noncurrent | $ 931 | $ 816 |
| Minimum [Member] | ||
| Operating Leased Assets [Line Items] | ||
| Lessee, Operating Lease, Renewal Term | 6 months | |
| Maximum [Member] | ||
| Operating Leased Assets [Line Items] | ||
| Lessee, Operating Lease, Renewal Term | 49 years |