CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Consolidated net income	$ 10.0	$ 5.7
Adjustments to reconcile consolidated net income to cash flows from operating activities:
Depreciation and amortization	15.2	15.2
Write-down of demonstration inventories to net realizable value	7.6	7.8
Stock-based compensation expense	2.0	1.8
Deferred income taxes	0.3	(2.6)
Other non-cash expenses, net	0.7	(1.2)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	12.8	8.7
Inventories	(38.0)	(37.0)
Accounts payable and accrued expenses	21.9	(7.8)
Income taxes payable	2.0	(4.0)
Deferred revenue	5.0	2.9
Customer advances	(7.6)	3.7
Other changes in operating assets and liabilities, net	(13.4)	(11.4)
Net cash provided by (used in) operating activities	18.5	(18.2)
Cash flows from investing activities:
Purchases of property, plant and equipment	(9.2)	(14.6)
Sales of property, plant and equipment	0.6	0.6
Disposal of product line	0.7	0.5
Cash paid for acquisitions, net of cash acquired		(0.8)
Net cash used in investing activities	(7.9)	(14.3)
Cash flows from financing activities:
Repayment of other debt, net	(0.2)	(0.7)
Proceeds from issuance of common stock, net	3.0	4.1
Changes in restricted cash	(0.3)	(3.1)
Net cash provided by financing activities	2.5	0.3
Effect of exchange rate changes on cash and cash equivalents	2.2	(9.0)
Net change in cash and cash equivalents	15.3	(41.2)
Cash and cash equivalents at beginning of period	438.7	310.6
Cash and cash equivalents at end of period	$ 454.0	$ 269.4