Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Cash receipts from customers	$ 175,567	$ 151,769
Cash paid for prescriptions dispensed and health services rendered	(101,318)	(90,887)
Insurance benefits paid	(41,108)	(33,920)
Cash paid to other suppliers and employees	(17,686)	(15,119)
Interest and investment income received	801	200
Interest paid	(1,131)	(1,150)
Income taxes paid	(1,779)	(1,887)
Net cash provided by operating activities	13,346	9,006
Cash flows from investing activities:
Proceeds from sales and maturities of investments	3,640	4,360
Purchases of investments	(4,499)	(5,010)
Purchases of property and equipment	(1,575)	(1,459)
Acquisitions (net of cash and restricted cash acquired)	(16,474)	(125)
Proceeds from sale of subsidiaries (net of cash and restricted cash sold of $2,807 in 2022)	0	(1,943)
Other	32	54
Net cash used in investing activities	(18,876)	(4,123)
Cash flows from financing activities:
Commercial paper borrowings (repayments), net	1,000	0
Proceeds from issuance of short-term loan	5,000	0
Repayment of short-term loan	(5,000)	0
Proceeds from issuance of long-term debt	10,898	0
Repayments of long-term debt	(1,787)	(1,529)
Repurchase of common stock	(2,016)	(2,000)
Dividends paid	(1,574)	(1,462)
Proceeds from exercise of stock options	120	348
Payments for taxes related to net share settlement of equity awards	(168)	(329)
Other	(121)	(139)
Net cash provided by (used in) financing activities	6,352	(5,111)
Net increase (decrease) in cash, cash equivalents and restricted cash	822	(228)
Cash, cash equivalents and restricted cash at the beginning of the period	13,305	12,691
Cash, cash equivalents and restricted cash at the end of the period	14,127	12,463
Reconciliation of net income to net cash provided by operating activities:
Net income	4,056	5,394
Adjustments required to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,105	2,131
Stock-based compensation	307	236
Gain on sale of subsidiary	0	(225)
Deferred income taxes and other noncash items	87	(246)
Change in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable, net	(804)	(2,687)
Inventories	1,800	469
Other assets	(913)	(286)
Accounts payable and pharmacy claims and discounts payable	(118)	2,033
Health care costs payable and other insurance liabilities	4,334	1,286
Other liabilities	2,492	901
Net cash provided by operating activities	$ 13,346	$ 9,006