Indebtedness (Credit Facilities) (Details) |
Dec. 31, 2021
USD ($)
|
|---|---|
| Line of Credit Facility [Line Items] | |
| Committed Credit Facilities | $ 6,300,000,000 |
| 364-day revolving credit, expiring February 1, 2022 | |
| Line of Credit Facility [Line Items] | |
| Committed Credit Facilities | 1,800,000,000 |
| Multi-year revolving credit, expiring February 10, 2026 | |
| Line of Credit Facility [Line Items] | |
| Committed Credit Facilities | 2,000,000,000.0 |
| Multi-year revolving credit, expiring September 29, 2026 | |
| Line of Credit Facility [Line Items] | |
| Committed Credit Facilities | $ 2,500,000,000 |