Condensed Consolidated Statements of Cash Flow - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Cash from operating activities:
Net income	$ 744.2	$ 552.0
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	236.3	103.8
Stock-based compensation expense	26.6	23.8
Deferred income tax (benefit) provision	(13.9)	1.9
Net change in components of working capital	(271.3)	(73.9)
Net change in other long-term assets and liabilities	43.0	(8.1)
Net cash provided by operating activities	764.9	599.5
Cash from investing activities:
Capital expenditures	(188.6)	(94.3)
Proceeds from disposals of property, plant and equipment	4.1	0.5
Purchases of investments	(3.1)	(11.9)
Sales and maturities of investments	7.2	87.6
Acquisitions, net of cash acquired	(2,172.2)	0.0	$ (2,156.4)
Other, net	0.0	1.1
Net cash used in investing activities	(2,352.6)	(17.0)
Cash from financing activities:
Repayments of senior notes and other long-term debt	(400.5)	(1.1)
Borrowings (repayments) under commercial paper programs, net	639.8	0.0
Payment of costs related to debt financing	0.0	(2.9)
Purchase of treasury stock	(180.9)	(153.8)
Proceeds from exercise of stock options	53.2	113.3
Dividend payments	(199.5)	(131.7)
Other, net	(0.7)	0.0
Net cash used in financing activities	(88.6)	(176.2)
Effect of exchange rate changes on cash and cash equivalents	16.5	(24.2)
Net (decrease) increase in cash and cash equivalents	(1,659.8)	382.1
Cash and cash equivalents balance, beginning of period	3,317.0	1,475.0	1,475.0
Cash and cash equivalents balance, end of period	1,657.2	1,857.1	$ 3,317.0
Cash paid for:
Interest	51.7	32.8
Income taxes, net	$ 167.9	$ 130.1