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Schedule I - Condensed Financial Information of Parent (Senior Notes and Junior Subordinated Notes) (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023
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Condensed Financial Statements, Captions [Line Items] |  |  |  |
Recourse Debt Total | $ 5,704 |  |  | $ 4,464
Recourse Debt Current | (899) |  |  | (200)
Recourse Debt Non Current | 4,805 | $ 4,840 | $ 5,256 | 4,264
Parent Company |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Recourse Debt Total | 5,704 |  |  |
Recourse Debt Current | (899) |  |  |
Debt Maturity Year One [Member] |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Recourse Debt Total | 900 |  |  |
Debt Maturity Year One [Member] | Parent Company |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Recourse Debt Total | 900 |  |  |
Debt Maturity Year Two [Member] |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Recourse Debt Total | 800 |  |  |
Debt Maturity Year Two [Member] | Parent Company |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Recourse Debt Total | 800 |  |  |
Debt Maturity Year Three [Member] |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Recourse Debt Total | 0 |  |  |
Debt Maturity Year Three [Member] | Parent Company |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Recourse Debt Total | 0 |  |  |
Debt Maturity Year Four [Member] |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Recourse Debt Total | 900 |  |  |
Debt Maturity Year Four [Member] | Parent Company |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Recourse Debt Total | 900 |  |  |
Debt Maturity Year Five [Member] |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Recourse Debt Total | 0 |  |  |
Debt Maturity Year Five [Member] | Parent Company |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Recourse Debt Total | 0 |  |  |
Thereafter |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Recourse Debt Total | 3,150 |  |  |
Thereafter | Parent Company |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Recourse Debt Total | 3,150 |  |  |
Senior Variable Rate Term Loan due 2024 | Parent Company | Revolving Credit Facility [Member] | Recourse Debt |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Recourse Debt Total | 0 |  |  | 200
Recourse Debt Excluding Junior Subordinated Debt | Parent Company |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Recourse Debt Total | 5,704 |  |  | 4,464
Recourse Debt Non Current | $ 4,805 |  |  | $ 4,264

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- Definition The non-current portion of the entity's recourse debt. Recourse debt is direct borrowings by the Parent Company that is structurally subordinate to the affiliates' non-recourse debt. + References No definition available. + Details
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- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481231/810-10-45-11 + Details
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