Income Taxes - Reconciliation Of The Tax Provision At The U.S. Federal Statutory Rate To The Provision For Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Earnings before income tax expense	$ 1,813	$ 2,773	$ 1,782
Loss (earnings) attributable to flow through noncontrolling interest	2	9	11
Earnings less noncontrolling interest before income tax expense	1,815	2,782	1,793
Tax provision at the U.S. federal statutory rate	381	584	377
State income taxes, net of federal income tax benefit	63	106	49
Nondeductible compensation	40	54	42
Nondeductible pharmacy settlement	78	0	0
Nontaxable divestiture gains and losses	(95)	0	0
ACA Health Insurer Fee	0	316	0
Audit settlement	0	(71)	0
Valuation Allowance	29	(11)	0
Nondeductible goodwill	0	16	30
Other, net	(19)	(15)	(25)
Income tax expense	$ 477	$ 979	$ 473