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Equity - Statutory Net Income (Loss) and Capital & Surplus (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
MLIC |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Statutory net income (loss) | $ 2,457 | $ 3,407 | $ 2,737
Statutory capital and surplus | 9,787 | 11,593 |
American Life |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Statutory net income (loss) | 365 | 767 | 824
Statutory capital and surplus | 7,555 | 8,272 |
Metropolitan Tower Life Insurance Company (“MTL”) |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Statutory net income (loss) | 361 | 411 | 232
Statutory capital and surplus | 2,247 | 2,461 |
Other |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Statutory net income (loss) | 65 | 53 | $ 91
Statutory capital and surplus | $ 347 | $ 358 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(23)(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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- Definition The amount of statutory capital and surplus (stockholders' equity) as of the balance sheet date using prescribed or permitted statutory accounting practices (rather than GAAP, if different) of the state or country. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(23)(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 944 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477908/944-505-50-1 + Details
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- Definition Amount of net income for the period determined using accounting principles prescribed or permitted by insurance regulators. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(23)(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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