CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Consolidated net income	$ 161.4	$ 198.0	$ 181.0
Adjustments to reconcile consolidated net income to cash flows from operating activities:
Depreciation and amortization	80.4	75.6	64.9
Stock-based compensation expense	16.0	9.6	11.3
Deferred income taxes	(22.5)	(5.4)	(15.1)
Impairment and other non-cash expenses, net	27.3	10.1	39.8
Changes in operating assets and liabilities, net of acquisitions and divestitures:
Accounts receivable	40.8	(5.0)	(30.5)
Inventories	(91.6)	(60.2)	(35.5)
Accounts payable and accrued expenses	(2.4)	15.9	5.0
Income taxes payable	42.9	13.1	4.0
Deferred revenue	16.9	7.3	7.1
Customer advances	51.7	4.2	3.5
Other changes in operating assets and liabilities	11.3	(49.8)	4.2
Net cash provided by operating activities	332.2	213.4	239.7
Cash flows from investing activities:
Purchases of short-term investments	(150.0)	(6.4)
Maturities of short-term investments	106.1		117.0
Purchase of available for sale debt securities	(1.2)
Cash paid for acquisitions, net of cash acquired	(59.2)	(90.0)	(191.6)
Purchases of property, plant and equipment	(97.2)	(73.0)	(49.2)
Proceeds from sales of property, plant and equipment	0.2	11.0	0.4
Net proceeds from cross-currency swap agreements	8.6
Net cash used in investing activities	(192.7)	(158.4)	(123.4)
Cash flows from financing activities:
Proceeds from 2019 Note Purchase Agreement		297.9
Proceeds from 2019 Term Loan Agreement		300.0
Repayments of revolving lines of credit	(305.1)	(361.9)	(218.1)
Proceeds from revolving lines of credit	297.5	250.6	129.4
Repayments of 2012 Note Purchase Agreement		(15.0)
Repayment of other debt, net	(0.7)	(4.6)	(4.8)
Payment of deferred financing costs	(0.1)	(4.4)
Proceeds from issuance of common stock, net	3.3	10.9	9.4
Payment of contingent consideration	(7.5)	(6.2)	(2.3)
Payment of dividends to common stockholders	(24.6)	(25.0)	(25.1)
Repurchase of common stock	(123.2)	(142.3)
Cash payments to noncontrolling interest	(1.2)		(0.9)
Net cash (used in) provided by financing activities	(161.6)	300.0	(112.4)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	25.7	0.6	(6.5)
Net change in cash, cash equivalents and restricted cash	3.6	355.6	(2.6)
Cash, cash equivalents and restricted cash at beginning of year	681.9	326.3	328.9
Cash, cash equivalents and restricted cash at end of year	685.5	681.9	326.3
Supplemental cash flow information
Cash paid for interest	28.7	16.0	11.7
Cash paid for taxes	43.0	61.3	60.5
Restricted cash period beginning balance	3.6	3.9	3.9
Restricted cash period ending balance	$ 3.7	$ 3.6	$ 3.9