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Insurance Company Regulatory Requirements - Dividends and Surplus Notes By Insurance Company Subsidiaries (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Statutory Accounting Practices [Line Items] |  |  |
Dividends paid | $ 64 | $ 66 | $ 69
AGC | AGC | Affiliated Entity |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Dividends paid | 207 | 94 | 166
Assured Guaranty Municipal Corp | AGMH | Affiliated Entity |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Dividends paid | 266 | 291 | 267
Assured Guaranty Municipal Corp | AGE | Affiliated Entity |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Contributions | 0 | 0 | (123)
AG Re | Assured Guaranty LTD | Fixed-maturity securities |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Dividend from a subsidiary in the form of fixed-maturity securities | 0 | 46 | 47
AG Re | Assured Guaranty LTD | Affiliated Entity |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Dividends paid | 0 | 150 | 150
AGUK | Assured Guaranty Municipal Corp | Affiliated Entity |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Dividends paid | $ 0 | $ 0 | $ 124

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- Definition Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585 + Details
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