Loans to and Investments in Associated Companies - Berkadia (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2009 |
May 31, 2022 |
|
| Berkadia | ||
| Investments In Associated Companies [Line Items] | ||
| Surety policy issued | $ 1,500,000,000 | |
| Reimbursement of losses incurred, maximum percentage | 50.00% | |
| Commercial paper | $ 1,470,000,000 | |
| Berkadia | ||
| Investments In Associated Companies [Line Items] | ||
| Capital contributed | $ 217,200,000 | |
| Equity method investment, ownership percentage | 50.00% | |
| Percentage of profits received from joint venture | 45.00% | |
| Reimbursement of losses incurred, maximum percentage | 50.00% |