Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net income	$ 473	$ 566
Adjustments to reconcile net income to net cash provided by operating activities:
Net realized capital (gains) losses	(49)	2
Equity in net earnings	(8)	(3)
Stock-based compensation	36	33
Depreciation	124	118
Amortization	21	18
Benefit for deferred income taxes	(3)	(21)
Changes in operating assets and liabilities, net of effect of businesses acquired and dispositions:
Receivables	(953)	(940)
Other assets	(1,470)	(102)
Benefits payable	1,086	1,162
Other liabilities	1,203	16
Unearned revenues	27	29
Other	(13)	18
Net cash provided by operating activities	474	896
Cash flows from investing activities
Acquisitions, net of cash acquired	(709)	0
Purchases of property and equipment	(192)	(139)
Purchases of investment securities	(2,459)	(2,175)
Maturities of investment securities	735	397
Proceeds from sales of investment securities	1,415	2,062
Net cash (used in) provided by investing activities	(1,210)	145
Cash flows from financing activities
Receipts from contract deposits, net	574	554
Proceeds from issuance of senior notes, net	1,090	0
Proceeds from issuance of commercial paper, net	198	17
Proceeds from term loan	1,000	0
Change in book overdraft	(55)	(17)
Common stock repurchases	(17)	(10)
Dividends paid	(73)	(68)
Proceeds from stock option exercises and other, net	19	17
Net cash provided by financing activities	2,736	493
Increase in cash and cash equivalents	2,000	1,534
Cash and cash equivalents at beginning of period	4,054	2,343
Cash and cash equivalents at end of period	6,054	3,877
Supplemental cash flow disclosures:
Interest payments	40	29
Income tax refunds, net	$ (6)	$ (22)