CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Consolidated net income	$ 23.6	$ 6.9
Adjustments to reconcile consolidated net income to cash flows from operating activities:
Depreciation and amortization	13.2	13.5
Write-down of demonstration inventories to net realizable value	4.8	5.0
Stock-based compensation expense	2.2	2.2
Deferred income taxes	(2.7)	(3.7)
Other non-cash expenses, net	1.7	7.3
Changes in operating assets and liabilities, net of acquisitions and divestitures:
Accounts receivable	7.2	51.5
Inventories	(28.8)	(36.6)
Accounts payable and accrued expenses	(9.0)	(6.8)
Income taxes payable, net	(13.7)	(6.9)
Deferred revenue	9.2	(3.1)
Customer advances	(18.4)	8.9
Other changes in operating assets and liabilities, net	(3.3)	(11.2)
Net cash (used in) provided by operating activities	(14.0)	27.0
Cash flows from investing activities:
Purchase of short-term investments	(21.7)	(21.5)
Maturity of short-term investments	21.7	21.5
Purchases of property, plant and equipment	(8.0)	(5.7)
Proceeds from sales of property, plant and equipment	0.6
Net cash used in investing activities	(7.4)	(5.7)
Cash flows from financing activities:
Proceeds from revolving lines of credit	36.0
Proceeds (repayment) of other debt, net	0.4	(0.1)
Proceeds from issuance of common stock, net	7.5	3.3
Payment of contingent consideration		(2.1)
Repurchase of common stock	(78.9)
Changes in restricted cash	(0.1)	0.8
Payment of dividends	(6.5)
Excess tax benefit related to stock option awards		2.2
Net cash (used in) provided by financing activities	(41.6)	4.1
Effect of exchange rate changes on cash and cash equivalents	5.8	(10.4)
Net change in cash and cash equivalents	(57.2)	15.0
Cash and cash equivalents at beginning of period	267.1	319.5
Cash and cash equivalents at end of period	$ 209.9	$ 334.5