CONSOLIDATED STATEMENTS OF CASH FLOW - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Cash flows from operating activities
Net income	$ 1,203	$ 1,214	$ 2,484
Adjustments to reconcile net income to net cash provided by operating activities:
Loss on sale of business	67	0	0
Loss (gain) on investment securities, net	50	(24)	54
Equity in net losses	102	94	63
Stock-based compensation	241	207	175
Depreciation	773	908	850
Amortization	51	60	67
Impairment of property and equipment	28	237	206
Impairment of indefinite-lived intangible assets	128	200	55
Deferred income taxes	75	(192)	(167)
Changes in operating assets and liabilities, net of effect of businesses acquired and dispositions:
Receivables	(570)	(669)	(337)
Other assets	(2,173)	1,003	(1,318)
Benefits payable	(472)	199	915
Other liabilities	1,322	(373)	841
Unearned revenues	96	(6)	(20)
Other, net	0	108	113
Net cash provided by operating activities	921	2,966	3,981
Cash flows from investing activities
Proceeds from sale of business, net	115	0	0
Acquisitions, net of cash and cash equivalents acquired	(81)	(89)	(233)
Purchases of property and equipment	(546)	(575)	(1,004)
Proceeds from sale of property and equipment	23	7	210
Changes in securities lending collateral receivable	(220)	(418)	0
Purchases of investment securities	(6,440)	(8,185)	(7,552)
Proceeds from maturities of investment securities	2,912	2,982	1,292
Proceeds from sales of investment securities	6,510	3,376	3,795
Other	0	(50)	0
Net cash provided by (used in) investing activities	2,273	(2,952)	(3,492)
Cash flows from financing activities
(Payments) receipts from contract deposits, net	(1,076)	(1,933)	828
Proceeds from issuance of senior notes, net	1,481	2,232	2,544
Repayment of senior notes	(948)	(1,107)	(1,832)
(Repayments) proceeds from issuance of commercial paper, net	(5)	(907)	211
Proceeds from short-term borrowings	0	0	100
Repayment of short-term borrowings	0	0	(100)
Repayment of term loan	0	0	(500)
Debt issue costs	(5)	(7)	(7)
Common stock repurchases	(151)	(817)	(1,573)
Dividends paid	(430)	(431)	(431)
Changes in securities lending payable	220	418	0
Changes in rebate factor payable	(123)	123	0
Change in book overdraft	(97)	50	55
Other, net	(81)	(108)	(151)
Net cash used in financing activities	(1,215)	(2,487)	(856)
Increase (decrease) in cash and cash equivalents	1,979	(2,473)	(367)
Cash and cash equivalents at beginning of period	2,221	4,694	5,061
Cash and cash equivalents at end of period	4,200	2,221	4,694
Supplemental cash flow disclosures:
Interest payments	628	584	394
Details of businesses acquired in purchase transactions:
Fair value of assets acquired, net of cash acquired	91	124	462
Less: Fair value of liabilities assumed	(10)	(35)	(234)
Less: Noncontrolling interests acquired	0	0	5
Cash paid for acquired businesses, net of cash acquired	$ 81	$ 89	$ 233