CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities
Net income	$ 3,024	$ 2,820
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of Gentiva Hospice	0	(240)
Loss on investment securities, net	49	136
Equity in net losses (earnings)	39	(1)
Stock-based compensation	142	173
Depreciation	628	555
Amortization	51	73
Impairment of property and equipment	31	144
Deferred income taxes	0	(33)
Changes in operating assets and liabilities, net of effect of businesses acquired and disposed:
Receivables	(126)	11
Other assets	(935)	(465)
Benefits payable	870	948
Other liabilities	39	(195)
Unearned revenues	7,250	5,758
Other	53	30
Net cash provided by operating activities	11,115	9,714
Cash flows from investing activities
Proceeds from sale of Gentiva Hospice, net	0	2,708
Acquisitions, net of cash and cash equivalents acquired	(223)	(293)
Purchases of property and equipment, net	(721)	(862)
Purchases of investment securities	(3,366)	(4,740)
Proceeds from maturities of investment securities	885	1,214
Proceeds from sales of investment securities	815	1,979
Net cash (used in) provided by investing activities	(2,610)	6
Cash flows from financing activities
Receipts from contract deposits, net	2,481	3,787
Proceeds from issuance of senior notes, net	1,215	744
Repayments of senior notes	(1,719)	0
Proceeds from issuance (repayments) of commercial paper, net	1,618	(660)
Repayment of term loan	(500)	(2,000)
Debt issue costs	(4)	(2)
Change in book overdraft	(52)	(89)
Common stock repurchases	(1,002)	(1,032)
Dividends paid	(320)	(291)
Other	(135)	(13)
Net cash provided by financing activities	1,582	444
Increase in cash and cash equivalents	10,087	10,164
Cash and cash equivalents at beginning of period	5,061	3,394
Cash and cash equivalents at end of period	15,148	13,558
Supplemental cash flow disclosures:
Interest payments	317	256
Income tax payments, net	957	751
Details of businesses acquired in purchase transactions:
Fair value of assets acquired, net of cash and cash equivalents acquired	454	411
Less: Fair value of liabilities assumed	(236)	(65)
Less: Noncontrolling interests acquired	5	(53)
Cash paid for acquired businesses, net of cash and cash equivalents acquired	$ 223	$ 293