CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Consolidated net income	$ 21.7	$ 23.6
Adjustments to reconcile consolidated net income to cash flows from operating activities:
Depreciation and amortization	15.1	13.2
Write-down of demonstration inventories to net realizable value	2.8	4.8
Stock-based compensation expense	2.6	2.2
Deferred income taxes	0.4	(2.7)
Other non-cash expenses, net	1.3	1.7
Changes in operating assets and liabilities, net of acquisitions and divestitures:
Accounts receivable	25.6	7.2
Inventories	(31.1)	(28.8)
Accounts payable and accrued expenses	(2.7)	(9.0)
Income taxes payable, net	(6.4)	(13.7)
Deferred revenue	0.9	9.2
Customer advances	(3.1)	(18.4)
Other changes in operating assets and liabilities, net	5.5	(3.3)
Net cash provided by (used in) operating activities	32.6	(14.0)
Cash flows from investing activities:
Purchases of short-term investments	(85.3)	(21.7)
Maturities of short-term investments	58.7	21.7
Cash paid for acquisitions, net of cash acquired	(39.8)
Purchases of property, plant and equipment	(11.5)	(8.0)
Proceeds from sales of property, plant and equipment	6.6	0.6
Net cash used in investing activities	(71.3)	(7.4)
Cash flows from financing activities:
Repayments of the Note Purchase Agreement	(20.0)
Repayments of revolving lines of credit	(40.0)
Proceeds from revolving lines of credit	33.0	36.0
Proceeds (repayment) of other debt, net	(0.1)	0.4
Proceeds from issuance of common stock, net	1.2	7.5
Repurchase of common stock		(78.9)
Payment of dividends	(6.4)	(6.5)
Net cash used in financing activities	(32.3)	(41.5)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	5.8	6.0
Net change in cash, cash equivalents and restricted cash	(65.2)	(56.9)
Cash, cash equivalents and restricted cash at beginning of period	345.9	271.2
Cash, cash equivalents and restricted cash at end of period	$ 280.7	$ 214.3