CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Consolidated net income	$ 42.9	$ 33.1
Adjustments to reconcile consolidated net income to cash flows from operating activities:
Depreciation and amortization	40.0	47.6
Write-down of demonstration inventories to net realizable value	15.0	22.6
Stock-based compensation expense	5.8	7.1
Deferred income taxes	(1.1)
Loss (gain) on disposal of product line	0.2	(9.0)
Other non-cash expenses, net	9.5	11.1
Changes in operating assets and liabilities, net of acquisitions and divestitures:
Accounts receivable	37.7	21.5
Inventories	(40.7)	(46.9)
Accounts payable and accrued expenses	4.8	24.7
Income taxes payable, net	(4.5)	(14.8)
Deferred revenue	(1.2)	2.2
Customer advances	(9.7)	(35.1)
Other changes in operating assets and liabilities, net	(19.1)	(19.1)
Net cash provided by operating activities	79.6	45.0
Cash flows from investing activities:
Purchases of short-term investments	(78.0)	(120.8)
Maturities of short-term investments	41.3
Cash paid for acquisitions, net of cash acquired		(3.9)
Proceeds from disposal of product line		12.8
Purchases of property, plant and equipment	(22.8)	(26.7)
Proceeds from sales of property, plant and equipment	0.7	2.9
Net cash used in investing activities	(58.8)	(135.7)
Cash flows from financing activities:
Proceeds from revolving lines of credit	17.0
Repayment of other debt, net	(0.4)	(0.7)
Proceeds from issuance of common stock, net	7.0	7.3
Payment of contingent consideration	(3.0)
Repurchase of common stock	(24.9)
Changes in restricted cash	1.4	0.7
Cash payments to noncontrolling interest	(0.5)	(1.1)
Excess tax benefit related to stock option awards	2.2
Net cash (used in) provided by financing activities	(1.2)	6.2
Effect of exchange rate changes on cash and cash equivalents	(8.1)	(25.0)
Net change in cash and cash equivalents	11.5	(109.5)
Cash and cash equivalents at beginning of period	319.5	438.7
Cash and cash equivalents at end of period	$ 331.0	$ 329.2