Consolidated Statements Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2016	Jan. 01, 2016	Jan. 02, 2015
Cash flows from operating activities:
Net income	$ 132.2	$ 120.7	$ 213.9
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	37.0	36.7	33.1
Amortization expense	150.8	162.4	158.5
Provision for doubtful accounts	3.0	1.9	3.8
Deferred income taxes	0.4	0.9	(1.7)
Stock-based compensation	52.6	50.1	43.4
Income from equity method investments	(17.6)	(17.9)	(12.4)
Gain on an equity sale	0.0	0.0	(15.1)
Divestiture (gain) loss, net	(3.5)	(3.9)	2.9
Excess tax benefit for stock-based compensation	(6.5)	(2.1)	(14.1)
Provision for excess and obsolete inventories	15.8	12.3	4.8
Other non-cash items	3.3	10.0	4.7
Add decrease (increase) in assets:
Accounts receivable	1.2	0.3	(10.9)
Other receivables	1.4	8.5	(2.3)
Inventories	24.0	(2.9)	(31.8)
Other current and non-current assets	(1.2)	(7.6)	(7.1)
Add increase (decrease) in liabilities:
Accounts payable	10.9	(6.4)	(7.2)
Accrued compensation and benefits	0.6	(0.1)	0.5
Deferred revenue	26.1	28.1	45.9
Accrued warranty expense	(1.1)	(2.0)	3.1
Accrued liabilities	(22.3)	(34.1)	(4.9)
Net cash provided by operating activities	407.1	354.9	407.1
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired	(38.8)	(156.3)	(307.9)
Acquisitions of property and equipment	(26.0)	(43.9)	(47.3)
Acquisitions of intangible assets	(0.3)	(0.1)	(7.6)
Purchases of equity method investments	(1.5)	(5.5)	(10.9)
Purchases of short-term investments	(113.3)	0.0	0.0
Proceeds from maturities of short-term investments	2.4	0.0	0.0
Net proceeds from sales of businesses	14.4	12.1	0.0
Dividends received from equity method investments	17.6	20.0	32.2
Other	1.1	1.3	(2.5)
Net cash used in investing activities	(144.4)	(172.4)	(344.0)
Cash flows from financing activities:
Issuance of common stock, net of tax withholdings	67.5	29.7	56.1
Repurchase and retirement of common stock	(119.5)	(234.4)	(97.8)
Excess tax benefit for stock-based compensation	6.5	2.1	14.1
Proceeds from debt and revolving credit lines	355.0	555.0	876.2
Payments on debt and revolving credit lines	(465.3)	(555.2)	(900.1)
Net cash used in financing activities	(155.8)	(202.8)	(51.5)
Effect of exchange rate changes on cash and cash equivalents	(6.8)	(11.7)	(10.8)
Net increase (decrease) in cash and cash equivalents	100.1	(32.0)	0.8
Cash and cash equivalents, beginning of fiscal year	116.0	148.0	147.2
Cash and cash equivalents, end of fiscal year	$ 216.1	$ 116.0	$ 148.0