SCHEDULE I - PARENT COMPANY FINANCIAL INFORMATION (Condensed Statements of Comprehensive Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Condensed Financial Statements, Captions [Line Items]
Net income attributable to Humana	$ 1,188	$ 1,207	$ 2,489
Other comprehensive (loss) income:
Change in gross unrealized investment (losses) gains	622	(62)	372
Effect of income taxes	(142)	15	(85)
Total change in unrealized investment (losses) gains, net of tax	480	(47)	287
Reclassification adjustment for net realized (gains) losses included in investment income	(60)	(27)	25
Effect of income taxes	14	6	(7)
Total reclassification adjustment, net of tax	(46)	(21)	18
Other comprehensive (loss) income, net of tax	434	(68)	305
Comprehensive income attributable to Humana	1,622	1,139	2,794
Parent Company
Condensed Financial Statements, Captions [Line Items]
Net income attributable to Humana	1,188	1,207	2,489
Other comprehensive (loss) income:
Change in gross unrealized investment (losses) gains	622	(62)	372
Effect of income taxes	(142)	15	(85)
Total change in unrealized investment (losses) gains, net of tax	480	(47)	287
Reclassification adjustment for net realized (gains) losses included in investment income	(60)	(27)	25
Effect of income taxes	14	6	(7)
Total reclassification adjustment, net of tax	(46)	(21)	18
Other comprehensive (loss) income, net of tax	434	(68)	305
Comprehensive income attributable to Humana	$ 1,622	$ 1,139	$ 2,794