Consolidated Statements of Cash Flows - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Cash Flows from Operating Activities
Net income		$ 1,189	$ 1,372
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		693	897
Realized investment losses (gains), net		88	(10)
Deferred income tax (benefit)		(161)	(162)
Debt extinguishment costs		185	0
Net changes in assets and liabilities, net of non-operating effects:
Accounts receivable		(1,056)	(396)
Inventories		96	440
Deferred policy acquisition costs		(138)	(51)
Reinsurance recoverable and Other assets		(210)	124
Insurance liabilities		341	360
Pharmacy and service costs payable		408	444
Accounts payable and Accrued expenses and other liabilities		308	91
Other, net		144	83
NET CASH PROVIDED BY OPERATING ACTIVITIES		1,887	3,192
Proceeds from investments sold:
Debt securities and equity securities		756	1,471
Investment maturities and repayments:
Debt securities and equity securities		408	319
Commercial mortgage loans		5	89
Other sales, maturities and repayments (primarily short-term and other long-term investments)		346	367
Investments purchased or originated:
Debt securities and equity securities		(1,174)	(1,088)
Commercial mortgage loans		0	(95)
Other (primarily short-term and other long-term investments)		(380)	(388)
Property and equipment purchases, net		(267)	(194)
Acquisitions, net of cash acquired		0	(6)
Other, net		37	0
NET CASH (USED IN) PROVIDED BY INVESTING ACTIVITIES		(269)	475
Cash Flows from Financing Activities
Deposits and interest credited to contractholder deposit funds		267	247
Withdrawals and benefit payments from contractholder deposit funds		(255)	(251)
Net change in short-term debt		(180)	(1,048)
Payments for debt extinguishment		(192)	0
Repayment of long-term debt		(4,209)	(1,000)
Net proceeds on issuance of long-term debt		3,470	0
Repurchase of common stock		(956)	(462)
Issuance of common stock		153	53
Other, net		84	(73)
NET CASH (USED IN) FINANCING ACTIVITIES		(1,818)	(2,534)
Effect of foreign currency rate changes on cash, cash equivalents and restricted cash		(37)	(12)
Net (decrease) increase in cash, cash equivalents and restricted cash		(237)	1,121
Cash, cash equivalents, and restricted cash January 1,	[1]	5,411	3,855
Cash, cash equivalents and restricted cash, March 31,		5,174	4,976
Cash reclassified to assets of business held for sale		(597)	0
Cash, cash equivalents, and restricted cash March 31, per Consolidated Balance Sheets	[2]	4,577	4,976
Supplemental Disclosure of Cash Information:
Income taxes paid, net of refunds		81	29
Interest paid		$ 395	$ 377

[1] Includes restricted cash of $26 million reported in Other assets, $23 million reported in Long-term investments, and $743 million reported in Assets of business held for sale as of January 1, 2020.

[2] Includes restricted cash of $125 million reported in Other long-term investments as of March 31, 2020.