Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 27, 2019	Sep. 28, 2018
Cash flow from operating activities:
Net income	$ 235.1	$ 196.5
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	29.7	26.2
Amortization expense	128.6	132.9
Deferred income taxes	4.4	(27.4)
Stock-based compensation	52.1	53.1
Income from equity method investments, net of dividends	(9.5)	(0.2)
Other, net	4.3	14.4
(Increase) decrease in assets:
Accounts receivable, net	16.8	(15.8)
Inventories	1.7	(29.0)
Other current and non-current assets	10.4	(4.1)
Increase (decrease) in liabilities:
Accounts payable	13.6	9.2
Accrued compensation and benefits	(52.3)	(13.8)
Deferred revenue	33.4	53.8
Other current and non-current liabilities	(5.5)	(11.0)
Net cash provided by operating activities	462.8	384.8
Cash flow from investing activities:
Acquisitions of businesses, net of cash acquired	(28.6)	(1,741.4)
Acquisitions of property and equipment	(54.6)	(53.1)
Purchases of short-term investments	0.0	(24.0)
Proceeds from maturities of short-term investments	0.0	6.2
Proceeds from sales of short-term investments	0.0	196.8
Other, net	14.5	2.7
Net cash used in investing activities	(68.7)	(1,612.8)
Cash flow from financing activities:
Issuance of common stock, net of tax withholdings	28.4	52.3
Repurchases of common stock	(179.8)	(53.0)
Proceeds from debt and revolving credit lines	818.0	2,694.8
Payments on debt and revolving credit lines	(1,033.6)	(1,602.2)
Other, net	(10.2)	(8.9)
Net cash provided by (used in) financing activities	(377.2)	1,083.0
Effect of exchange rate changes on cash and cash equivalents	(4.8)	(8.1)
Net increase (decrease) in cash and cash equivalents	12.1	(153.1)
Cash and cash equivalents - beginning of period	172.5	358.5
Cash and cash equivalents - end of period	$ 184.6	$ 205.4