Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jul. 03, 2015	Jul. 04, 2014
Cash flow from operating activities:
Net income	$ 59.8	$ 146.2
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	17.9	15.6
Amortization expense	81.5	78.4
Provision for doubtful accounts	1.2	0.9
Deferred income taxes	(0.8)	(1.7)
Stock-based compensation	24.5	21.1
Income from equity method investments	(9.4)	(8.7)
Gain on an equity sale	0.0	(15.1)
Acquisition / divestiture gain (loss)	(5.6)	4.3
Excess tax benefit for stock-based compensation	(0.9)	(13.5)
Provision for excess and obsolete inventories	2.0	1.7
Other non-cash items	10.0	(6.2)
Add decrease (increase) in assets:
Accounts receivable	1.3	(42.6)
Other receivables	3.7	(3.7)
Inventories	(11.8)	(21.3)
Other current and non-current assets	(8.3)	(8.0)
Add increase (decrease) in liabilities:
Accounts payable	6.1	0.5
Accrued compensation and benefits	(0.8)	5.6
Deferred revenue	49.5	49.0
Accrued warranty expense	(1.4)	1.1
Other liabilities	(14.5)	11.0
Net cash provided by operating activities	204.0	214.6
Cash flow from investing activities:
Acquisitions of businesses, net of cash acquired	(59.1)	(25.1)
Acquisitions of property and equipment	(26.5)	(28.4)
Purchases of equity investments	(2.8)	(2.6)
Net proceeds from sale of business	12.6	0.0
Dividends received from equity method investments	7.7	22.5
Other	0.4	(0.1)
Net cash used in investing activities	(67.7)	(33.7)
Cash flow from financing activities:
Issuances of common stock, net of tax withholding	16.0	39.3
Repurchase and retirement of common stock	(73.0)	0.0
Excess tax benefit for stock-based compensation	0.9	13.5
Proceeds from debt and revolving credit lines	220.0	17.0
Payments on debt and revolving credit lines	(312.1)	(119.5)
Net cash used in financing activities	(148.2)	(49.7)
Effect of exchange rate changes on cash and cash equivalents	(7.1)	0.5
Net increase (decrease) in cash and cash equivalents	(19.0)	131.7
Cash and cash equivalents, beginning of period	148.0	147.2
Cash and cash equivalents, end of period	$ 129.0	$ 278.9