Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities
Net income	$ 2,947	$ 3,641
Adjustments to reconcile net income to net cash provided by operating activities:
Losses (gains) on investment securities, net	18	(696)
Gain on Kindred at Home equity method investment	(1,129)	0
Equity in net earnings	(69)	(68)
Stock-based compensation	132	129
Depreciation	468	390
Amortization	51	66
Benefit for deferred income taxes	0	(3)
Changes in operating assets and liabilities, net of effect of businesses acquired:
Receivables	(294)	(82)
Other assets	(476)	(1,547)
Benefits payable	573	2,204
Other liabilities	207	1,257
Unearned revenues	(84)	40
Other	14	25
Net cash provided by operating activities	2,358	5,356
Cash flows from investing activities
Acquisitions, net of cash and cash equivalents acquired	(3,959)	(709)
Purchases of property and equipment, net	(945)	(668)
Purchases of investment securities	(6,573)	(7,230)
Proceeds from maturities of investment securities	2,103	3,500
Proceeds from sales of investment securities	2,920	2,097
Net cash used in investing activities	(6,454)	(3,010)
Cash flows from financing activities
Receipts (withdrawals) from contract deposits, net	605	(274)
Proceeds from issuance of senior notes, net	2,984	1,088
Proceeds from issuance of commercial paper, net	193	21
Proceeds from term loan	500	1,000
Repayment of term loan	(150)	0
Debt issue costs	(29)	0
Change in book overdraft	(80)	(11)
Common stock repurchases	(36)	(30)
Dividends paid	(263)	(239)
Proceeds from stock option exercises and other, net	3	30
Net cash provided by financing activities	3,727	1,585
(Decrease) increase in cash and cash equivalents	(369)	3,931
Cash and cash equivalents at beginning of period	4,673	4,054
Cash and cash equivalents at end of period	4,304	7,985
Supplemental cash flow disclosures:
Interest payments	183	159
Income tax payments, net	219	778
Details of businesses acquired in purchase transactions:
Fair value of assets acquired, net of cash acquired	9,572	816
Less: Fair value of liabilities assumed	(3,231)	(107)
Less: Noncontrolling interests acquired	(22)	0
Less: Remeasured existing Kindred at Home equity method investment	(2,360)	0
Cash paid for acquired businesses, net of cash acquired	$ 3,959	$ 709