Statutory Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2026	Dec. 31, 2025	Dec. 31, 2024
Statutory Accounting Practices [Line Items]
Statutory risk-based capital necessary to satisfy regulatory requirements		$ 9,100
Total Shareholders		43,882	$ 41,315
Statutory accounting practices, dividends paid with approval of regulatory agency		2,543
Forecast
Statutory Accounting Practices [Line Items]
Statutory accounting practices, dividends paid with approval of regulatory agency	$ 2,100
California Department of Managed Health Care
Statutory Accounting Practices [Line Items]
Statutory risk-based capital necessary to satisfy regulatory requirements		1,100
Insurance, HMO Subsidiaries and Other Regulated Entities, Excluding the California Department of Managed Health Care
Statutory Accounting Practices [Line Items]
Statutory-basis capital and surplus		22,611
California Department of Managed Health Care Regulated Entities
Statutory Accounting Practices [Line Items]
Total Shareholders		$ 2,969