Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating activities:
Net income	$ 767.4	$ 924.0	$ 421.7
Reconciliation of net income to cash flows provided by operating activities:
Depreciation	84.3	96.7	92.1
Amortization	120.4	154.6	134.1
Lease expense	28.7	27.9	27.1
Stock-based compensation	41.5	31.2	19.4
Deferred taxes	(71.7)	(33.3)	(5.4)
Loss (gain) on sale of discontinued operations	82.5	(7.0)	8.0
Other operating activities, net	28.8	46.2	14.7
Changes in assets and liabilities, excluding effects of acquisitions:
Receivables	1.5	(25.9)	(206.9)
Inventories	158.0	(165.2)	(136.8)
Contract assets	13.7	(18.9)	13.1
Prepaid expenses and other assets	(24.7)	21.6	(34.6)
Accounts payable	(27.0)	(60.5)	85.4
Accrued and other current liabilities	(10.1)	20.0	4.6
Contract liabilities	23.4	27.4	13.1
Other long-term liabilities	(15.4)	(37.9)	(27.9)
Net cash provided by operating activities	1,201.3	1,000.9	421.7
Investing activities:
Proceed from sale of discontinued operation, net of cash disposed	510.6	132.0	247.7
Capital expenditures	(142.2)	(183.5)	(134.8)
Acquisitions, net of cash acquired	(36.1)	(24.7)	(1,571.3)
Investment in securities			(30.2)
Investment in securities	1.1	10.3
Other investing activities, net	19.0	4.8	2.2
Net cash provided by (used in) investing activities	352.4	(61.1)	(1,486.4)
Financing activities:
Proceeds from notes	0.0	0.0	842.6
Repayments of notes	(300.0)	(350.0)	0.0
Borrowings from revolving credit facility	84.0	0.0	650.0
Repayments of revolving credit facility	(84.0)	0.0	(650.0)
Repurchases of common stock	(900.0)	(400.0)	(315.6)
Dividends paid	(160.3)	(134.4)	(112.5)
Proceeds from exercise of stock options	25.7	40.4	85.9
Withholding tax paid related to stock-based compensation	(11.7)	(14.7)	(8.5)
Financing costs	0.0	0.0	(1.7)
Other financing activities, net	(3.4)	(3.3)	(2.1)
Net cash (used in) provided by financing activities	(1,349.7)	(862.0)	488.1
Effect of foreign currency exchange rate changes on cash and cash equivalents	1.5	(2.2)	(1.2)
Change in cash and cash equivalents	205.5	75.6	(577.8)
Less: change in cash and cash equivalents of discontinued operations	(6.4)	9.9	(26.0)
Cash and cash equivalents
Cash and cash equivalents at beginning of period	364.8	299.1	850.9
Cash and cash equivalents at end of period	$ 576.7	$ 364.8	$ 299.1