Condensed Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash flows from operating activities:
Net income	$ 1,308	$ 1,112
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	275	266
Deferred income taxes	9	(125)
Stock-based compensation expense	90	90
(Gain) on sale of property and equipment	(62)	0
Other	(15)	31
Changes in assets and liabilities, net of effects of businesses acquired:
Trade accounts receivable, current	(320)	(121)
Other current and noncurrent assets	(60)	(355)
Accounts payable	(29)	(34)
Deferred revenues, current and noncurrent	(10)	(14)
Other current and noncurrent liabilities	(388)	(493)
Net cash provided by operating activities	798	357
Cash flows from investing activities:
Purchases of property and equipment	(144)	(158)
Proceeds from sale of property and equipment	70	0
Proceeds from maturity of held-to-maturity investment securities	0	3
Purchases of other investments	(16)	(1)
Proceeds from maturity or sale of other investments	1	260
Payments for business combinations, net of cash acquired	0	(421)
Net cash (used in) investing activities	(89)	(317)
Cash flows from financing activities:
Issuance of common stock under stock-based compensation plans	33	35
Repurchases of common stock	(577)	(209)
Repayment of Term Loan borrowings and earnout and finance lease obligations	(21)	(50)
Repayment of notes outstanding under the revolving credit facility	(300)	0
Dividends paid	(308)	(301)
Net cash (used in) financing activities	(1,173)	(525)
Effect of exchange rate changes on cash, cash equivalents and restricted cash and cash equivalents	29	(39)
(Decrease) in cash, cash equivalents and restricted cash and cash equivalents	(435)	(524)
Cash, cash equivalents and restricted cash and cash equivalents beginning of year	2,231	2,717
Cash and cash equivalents, end of period	$ 1,796	$ 2,193