CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Consolidated net income	$ 26.8	$ 29.0
Adjustments to reconcile consolidated net income to cash flows from operating activities:
Depreciation and amortization	30.0	30.2
Write-down of demonstration inventories to net realizable value	15.2	16.0
Stock-based compensation expense	5.0	3.2
Deferred income taxes	0.3	(2.6)
Other non-cash expenses, net	1.2	(0.6)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	28.9	(20.9)
Inventories	(38.4)	(21.9)
Accounts payable and accrued expenses	8.9	(14.1)
Income taxes payable	8.8	(12.9)
Deferred revenue	1.9	5.0
Customer advances	(34.8)	(21.9)
Other changes in operating assets and liabilities, net	(22.3)	(13.4)
Net cash provided by (used in) operating activities	31.5	(24.9)
Cash flows from investing activities:
Purchases of short-term investments	(67.8)
Cash paid for acquisitions, net of cash acquired		(2.1)
Proceeds from disposal of product line	0.7	0.5
Purchases of property, plant and equipment	(16.8)	(31.1)
Proceeds from sales of property, plant and equipment	1.1	0.6
Net cash used in investing activities	(82.8)	(32.1)
Cash flows from financing activities:
Repayment of other debt, net	(0.5)	(0.5)
Proceeds from issuance of common stock, net	4.8	4.5
Changes in restricted cash		(1.3)
Cash payments to noncontrolling interests	(1.1)
Net cash provided by financing activities	3.2	2.7
Effect of exchange rate changes on cash and cash equivalents	(0.8)	(5.4)
Net change in cash and cash equivalents	(48.9)	(59.7)
Cash and cash equivalents at beginning of period	438.7	310.6
Cash and cash equivalents at end of period	$ 389.8	$ 250.9