Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income attributable to Humana	$ 696	$ 588	$ 1,626	$ 1,416
Other comprehensive income:
Change in gross unrealized investment (losses) gains	(623)	136	(1,392)	(184)
Effect of income taxes	144	(31)	320	42
Total change in unrealized investment (losses) gains, net of tax	(479)	105	(1,072)	(142)
Reclassification adjustment for net realized gains	0	(9)	(27)	(64)
Effect of income taxes	0	2	6	15
Total reclassification adjustment, net of tax	0	(7)	(21)	(49)
Other comprehensive (loss) income, net of tax	(479)	98	(1,093)	(191)
Comprehensive income attributable to equity method investments	0	10	0	16
Comprehensive income attributable to Humana	$ 217	$ 696	$ 533	$ 1,241