Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net income	$ 2,707	$ 1,683	$ 2,448
Adjustments to reconcile net income to net cash provided by operating activities:
Loss on sale of business	0	786	0
Net realized capital gains	(62)	(90)	(14)
Equity in net earnings of Kindred at Home	(14)	(11)	0
Stock compensation	163	137	157
Depreciation	505	444	410
Amortization	70	90	75
Provision for deferred income taxes	162	194	132
Changes in operating assets and liabilities, net of effect of businesses acquired and dispositions:
Receivables	(32)	(164)	426
Other assets	118	(484)	(582)
Benefits payable	1,142	252	105
Other liabilities	471	(676)	641
Unearned revenues	(36)	(95)	98
Other	90	107	155
Net cash provided by operating activities	5,284	2,173	4,051
Cash flows from investing activities
Acquisitions, net of cash acquired	0	(354)	(31)
Purchase of equity method investment in Kindred at Home	0	(1,095)	0
Cash transferred in sale of business	0	(805)	0
Purchases of property and equipment	(736)	(612)	(524)
Purchases of investment securities	(6,361)	(4,687)	(6,265)
Maturities of investment securities	1,733	972	1,111
Proceeds from sales of investment securities	4,086	3,494	2,768
Net cash used in investing activities	(1,278)	(3,087)	(2,941)
Cash flows from financing activities
(Receipts) withdrawals from contract deposits, net	(623)	(640)	1,823
Proceeds from issuance of senior notes, net	987	0	1,779
(Repayments) proceeds from issuance of commercial paper, net	(360)	485	(153)
Proceeds from term loan	0	1,000	0
Repayment of term loan	(650)	(350)	0
Repayment of long-term debt	(400)	0	(800)
Common stock repurchases	(1,070)	(1,090)	(3,365)
Dividends paid	(291)	(265)	(220)
Change in book overdraft	54	30	(71)
Proceeds from stock option exercises & other	58	45	62
Net cash used in financing activities	(2,295)	(785)	(945)
Increase (decrease) in cash and cash equivalents	1,711	(1,699)	165
Cash and cash equivalents at beginning of period	2,343	4,042	3,877
Cash and cash equivalents at end of period	4,054	2,343	4,042
Supplemental cash flow disclosures:
Interest payments	212	195	216
Income tax payments, net	518	631	1,498
Details of businesses acquired in purchase transactions:
Fair value of assets acquired, net of cash acquired	28	392	31
Less: Fair value of liabilities assumed	(28)	(38)	0
Cash paid for acquired businesses, net of cash acquired	$ 0	$ 354	$ 31