Condensed Consolidated Statements of Cash Flow - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Cash from operating activities:
Net income	$ 608.9	$ 518.3	$ 1,689.6	$ 1,426.4
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	201.2	101.0	428.7	291.4
Stock-based compensation expense			79.9	72.4
Deferred income tax provision (benefit)			(33.6)	(7.1)
Gain on bargain purchase acquisition	0.0	0.0	0.0	(5.4)
Net change in components of working capital			(197.6)	(81.2)
Net change in other long-term assets and liabilities			0.6	(9.6)
Net cash provided by operating activities			1,967.6	1,686.9
Cash from investing activities:
Capital expenditures			(465.6)	(267.8)
Proceeds from disposals of property, plant and equipment			7.1	2.1
Purchases of investments			(20.7)	(218.8)
Sales and maturities of investments			181.7	67.8
Acquisitions, net of cash acquired			(2,099.8)	(292.6)
Other, net			(0.9)	4.9
Net cash used in investing activities			(2,398.2)	(704.4)
Cash from financing activities:
Proceeds from issuance of senior notes and other long-term debt			1,500.1	354.0
Repayments of senior notes and other long-term debt			(353.7)	(10.3)
(Repayments) borrowings under commercial paper programs, net			0.0	(632.6)
Payment of costs related to debt financing			(14.7)	(2.3)
Payment of deferred purchase price related to acquisitions			0.0	(1.5)
Purchase of treasury stock			(520.4)	(469.8)
Proceeds from exercise of stock options			320.3	323.1
Distributions to and purchases of noncontrolling interests			(20.8)	(8.0)
Dividend payments	(132.4)	(125.1)	(396.2)	(375.0)
Other, net			1.2	0.0
Net cash provided by (used in) financing activities			515.8	(822.4)
Effect of exchange rate changes on cash and cash equivalents			2.8	(51.7)
Net increase (decrease) in cash and cash equivalents			88.0	108.4
Cash and cash equivalents balance, beginning of period			1,475.0	1,373.1	$ 1,373.1
Cash and cash equivalents balance, end of period	$ 1,563.0	$ 1,481.5	1,563.0	1,481.5	$ 1,475.0
Cash paid for:
Interest			112.6	89.1
Income taxes, net			$ 516.0	$ 423.8