Consolidated Statements Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Cash flows from operating activities:
Net income	$ 121.2	$ 132.2	$ 120.7
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	34.6	37.0	36.7
Amortization expense	148.8	150.8	162.4
Provision for doubtful accounts	1.2	3.0	1.9
Deferred income taxes	1.4	0.4	0.9
Stock-based compensation	64.8	52.6	50.1
Income from equity method investments	(29.5)	(17.6)	(17.9)
Divestitures gain, net	(6.4)	(3.5)	(3.9)
Provision for excess and obsolete inventories	5.5	15.8	12.3
Other non-cash items	5.2	3.3	10.0
Add decrease (increase) in assets:
Accounts receivable	(41.6)	1.2	0.3
Other receivables	3.6	1.4	8.5
Inventories	(38.7)	24.0	(2.9)
Other current and non-current assets	(19.1)	(1.2)	(7.6)
Add increase (decrease) in liabilities:
Accounts payable	25.9	10.9	(6.4)
Accrued compensation and benefits	33.7	0.6	(0.1)
Deferred revenue	16.4	26.1	28.1
Accrued warranty expense	0.6	(1.1)	(2.0)
Income taxes payable	88.2	(16.1)	(30.4)
Accrued liabilities	(3.9)	(6.2)	(3.7)
Net cash provided by operating activities	411.9	413.6	357.0
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired	(293.1)	(38.8)	(156.3)
Acquisitions of property and equipment	(43.7)	(26.0)	(43.9)
Purchases of equity method investments	0.0	(1.5)	(5.5)
Purchases of short-term investments	(288.0)	(113.3)	0.0
Proceeds from maturities of short-term investments	122.1	2.4	0.0
Proceeds from sales of short-term investments	97.7	0.0	0.0
Net proceeds from sales of businesses	20.1	14.4	12.1
Dividends received from equity method investments	18.1	17.6	20.0
Other	0.8	0.8	1.2
Net cash used in investing activities	(366.0)	(144.4)	(172.4)
Cash flows from financing activities:
Issuance of common stock, net of tax withholdings	73.8	67.5	29.7
Repurchases of common stock	(285.3)	(119.5)	(234.4)
Proceeds from debt and revolving credit lines	786.0	355.0	555.0
Payments on debt and revolving credit lines	(495.4)	(465.3)	(555.2)
Net cash provided by (used in) financing activities	79.1	(162.3)	(204.9)
Effect of exchange rate changes on cash and cash equivalents	17.4	(6.8)	(11.7)
Net increase (decrease) in cash and cash equivalents	142.4	100.1	(32.0)
Cash and cash equivalents, beginning of fiscal year	216.1	116.0	148.0
Cash and cash equivalents, end of fiscal year	$ 358.5	$ 216.1	$ 116.0