Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating activities:
Net income	$ 495.1	$ 151.5
Reconciliation of net income to net cash provided by operating activities:
Depreciation	48.0	46.3
Amortization	79.2	60.8
Lease expense	14.2	13.5
Stock-based compensation	15.8	8.7
Deferred taxes	0.4	0.7
Other operating activities, net	3.0	9.5
Changes in assets and liabilities, excluding effects of acquisitions:
Receivables	(372.2)	(190.7)
Inventories	(184.4)	(40.6)
Contract assets	(6.5)	13.7
Prepaid expenses and other assets	33.4	16.3
Accounts payable	121.2	118.3
Accrued and other current liabilities	(7.3)	(20.9)
Contract liabilities	10.4	6.8
Other long-term liabilities	(26.8)	(22.4)
Net cash provided by operating activities	223.5	171.5
Investing activities:
Proceeds from sale of discontinued operation, net of cash disposed	132.0	0.0
Capital expenditures	(82.7)	(55.1)
Acquisitions, net of cash acquired	(24.7)	0.0
Investment in securities	10.3
Investment in securities		(10.2)
Other investing activities, net	2.0	1.8
Net cash provided by (used in) investing activities	36.9	(63.5)
Financing activities:
Repurchases of common stock	(175.0)	(265.6)
Dividends paid	(56.7)	(56.0)
Proceeds from exercise of stock options	16.0	45.6
Withholding tax paid related to stock-based compensation	(12.5)	(7.7)
Other financing activities, net	(1.7)	(0.8)
Net cash used in financing activities	(229.9)	(284.5)
Effect of foreign currency exchange rate changes on cash and cash equivalents	(1.7)	(0.3)
Change in cash and cash equivalents	28.8	(176.8)
Less: change in cash and cash equivalents of discontinued operations	0.0	7.0
Cash and cash equivalents at beginning of period	324.4	897.1
Cash and cash equivalents at end of period	$ 353.2	$ 713.3