Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Cash receipts from customers	$ 151,769	$ 136,621
Cash paid for inventory and prescriptions dispensed by retail network pharmacies	(90,887)	(79,316)
Insurance benefits paid	(33,920)	(31,245)
Cash paid to other suppliers and employees	(15,119)	(14,900)
Interest and investment income received	200	394
Interest paid	(1,150)	(1,263)
Income taxes paid	(1,887)	(1,552)
Net cash provided by operating activities	9,006	8,739
Cash flows from investing activities:
Proceeds from sales and maturities of investments	4,360	3,947
Purchases of investments	(5,010)	(5,570)
Purchases of property and equipment	(1,459)	(1,315)
Acquisitions (net of cash acquired)	(125)	(108)
Proceeds from sale of subsidiaries (net of cash and restricted cash sold of $2,807)	(1,943)	0
Other	54	72
Net cash used in investing activities	(4,123)	(2,974)
Cash flows from financing activities:
Repayments of long-term debt	(1,529)	(5,423)
Repurchase of common stock	(2,000)	0
Dividends paid	(1,462)	(1,306)
Proceeds from exercise of stock options	348	330
Payments for taxes related to net share settlement of equity awards	(329)	(159)
Other	(139)	46
Net cash used in financing activities	(5,111)	(6,512)
Net decrease in cash, cash equivalents and restricted cash	(228)	(747)
Cash, cash equivalents and restricted cash at the beginning of the period	12,691	11,043
Cash, cash equivalents and restricted cash at the end of the period	12,463	10,296
Reconciliation of net income to net cash provided by operating activities:
Net income	5,274	5,015
Adjustments required to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,142	2,263
Stock-based compensation	236	232
Gain on sale of subsidiary	(225)	0
Deferred income taxes and other noncash items	(281)	(370)
Change in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable, net	(2,687)	(2,384)
Inventories	469	1,517
Other assets	(325)	(219)
Accounts payable and pharmacy claims and discounts payable	2,033	1,702
Health care costs payable and other insurance liabilities	1,467	104
Other liabilities	903	879
Net cash provided by operating activities	$ 9,006	$ 8,739