CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Consolidated net income	$ 6.9	$ 10.0
Adjustments to reconcile consolidated net income to cash flows from operating activities:
Depreciation and amortization	13.5	15.2
Write-down of demonstration inventories to net realizable value	5.0	7.6
Stock-based compensation expense	2.2	2.0
Deferred income taxes	(3.7)	0.3
Gain on disposal of product line		(0.3)
Other non-cash expenses, net	7.3	1.0
Changes in operating assets and liabilities, net of acquisitions and divestitures:
Accounts receivable	51.5	12.8
Inventories	(36.6)	(38.0)
Accounts payable and accrued expenses	(6.8)	21.9
Income taxes payable, net	(6.9)	(6.0)
Deferred revenue	(3.1)	5.0
Customer advances	8.9	(7.6)
Other changes in operating assets and liabilities, net	(11.2)	(5.4)
Net cash provided by operating activities	27.0	18.5
Cash flows from investing activities:
Purchases of short-term investments	(21.5)
Maturity of short-term investments	21.5
Proceeds from disposal of product line		0.7
Purchases of property, plant and equipment	(5.7)	(9.2)
Proceeds from sales of property, plant and equipment		0.6
Net cash used in investing activities	(5.7)	(7.9)
Cash flows from financing activities:
Repayment of other debt, net	(0.1)	(0.2)
Proceeds from issuance of common stock, net	3.3	3.0
Payment of contingent consideration	(2.1)
Changes in restricted cash	0.8	(0.3)
Excess tax benefit related to stock option awards	2.2
Net cash provided by financing activities	4.1	2.5
Effect of exchange rate changes on cash and cash equivalents	(10.4)	2.2
Net change in cash and cash equivalents	15.0	15.3
Cash and cash equivalents at beginning of period	319.5	438.7
Cash and cash equivalents at end of period	$ 334.5	$ 454.0