Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Operating activities:
Net income	$ 561.9	$ 749.8
Reconciliation of net income to net cash provided by operating activities:
Depreciation	66.9	72.7
Amortization	102.4	117.5
Lease expense	22.0	21.0
Stock-based compensation	36.4	21.4
Deferred taxes	(35.5)	(0.8)
Other operating activities, net	27.0	37.5
Changes in assets and liabilities, excluding effects of acquisitions:
Receivables	(145.3)	(291.3)
Inventories	117.0	(223.4)
Contract assets	13.2	(12.3)
Prepaid expenses and other assets	48.8	32.0
Accounts payable	49.4	71.1
Accrued and other current liabilities	(39.6)	7.9
Contract liabilities	14.0	22.5
Other long-term liabilities	(26.2)	(37.0)
Net cash provided by operating activities	812.4	588.6
Investing activities:
Capital expenditures	(106.3)	(130.5)
Proceeds from sale of discontinued operation, net of cash disposed	0.0	132.0
Acquisitions, net of cash acquired	0.0	(24.7)
Investment in securities	0.9	10.3
Other investing activities, net	18.7	2.2
Net cash used in investing activities	(86.7)	(10.7)
Financing activities:
Repayment of notes	(300.0)	0.0
Borrowings from revolving credit facility	84.0	0.0
Repayments of revolving credit facility	(84.0)	0.0
Repurchases of common stock	(580.0)	(201.1)
Dividends paid	(119.3)	(95.6)
Proceeds from exercise of stock options	17.7	39.3
Withholding tax paid related to stock-based compensation	(10.4)	(13.3)
Other financing activities, net	(2.5)	(2.5)
Net cash used in financing activities	(994.5)	(273.2)
Effect of foreign currency exchange rate changes on cash and cash equivalents	0.0	(3.7)
Change in cash and cash equivalents	(268.8)	301.0
Less: change in cash and cash equivalents of discontinued operations	(12.0)	7.3
Cash and cash equivalents at beginning of period	364.8	299.1
Cash and cash equivalents at end of period	$ 108.0	$ 592.8