Discontinued Operations and Disposal Groups, Including Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Jun. 03, 2026	Dec. 31, 2025
Disposal Group, Including Discontinued Operations [Line Items]
Assets held for sale	$ 961		$ 961			$ 864
Liabilities held for sale	223		223			176
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	61	$ 59	431	$ 162
Discontinued Operations, Disposed of by Sale \| Hartford Funds Management Group, Inc
Disposal Group, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents	569		569			473
Disposal Group, Including Discontinued Operation, Goodwill	272		272		$ 272	272
Disposal Group, Including Discontinued Operation, Other Assets	120		120			119
Assets held for sale	961		961			864
Disposal Group, Including Discontinued Operation, Deferred Tax Liabilities	36		36			32
Disposal Group, Including Discontinued Operation, Other Liabilities	187		187			144
Liabilities held for sale	223		223			$ 176
Disposal Group, Including Discontinued Operations, Fee Income	302	277	880	793
Disposal Group, Including Discontinued Operations, Net Investment Income	5	5	15	15
Disposal Groups, Including Discontinued Operations, Realized Investment Gains (Losses)	0	4	5	13
Disposal Group, Including Discontinued Operation, Revenue	307	286	900	821
Disposal Group, Including Discontinued Operation, Operating Expense	229	211	670	615
Disposal Group, Including Discontinued Operations, Expenses	229	211	670	615
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax	78	75	230	206
Discontinued Operation, Tax Effect of Income (Loss) from Discontinued Operation During Phase-out Period	17	16	(201)	44
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	$ 61	$ 59	431	162
Cash Provided by (Used in) Operating Activity, Discontinued Operation			161	152
Cash Provided by (Used in) Investing Activity, Discontinued Operation			$ (27)	$ (27)

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