Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Apr. 04, 2021	Mar. 29, 2020
Operating Activities
Net income	$ 84.7	$ 82.2
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	29.3	29.3
Stock-based compensation	7.0	9.6
Bridge financing and debt extinguishment expense	30.5	0.0
Changes in operating assets and liabilities excluding the effect of business acquired:
Accounts receivable and unbilled receivables	(17.2)	(14.6)
Inventories	17.8	(16.4)
Accounts payable	24.3	(1.0)
Deferred and income taxes receivable/payable, net	(4.1)	9.1
Prepaid expenses and other assets	(0.1)	10.0
Accrued expenses and other liabilities	(50.2)	(34.6)
Other operating, net	2.9	2.8
Net cash provided by operating activities	124.9	76.4
Investing Activities
Purchases of property, plant and equipment	(17.6)	(20.2)
Purchase of businesses, net of cash acquired	0.0	(28.9)
Net cash used in investing activities	(17.6)	(49.1)
Financing Activities
Net proceeds from fixed rate notes	2,975.8	0.0
Net payments on other debt	(496.5)	(0.3)
Proceeds from exercise of stock options	10.8	10.2
Payments for bridge financing and debt extinguishment	(30.5)	0.0
Other financing, net	(5.6)	0.0
Net cash provided by financing activities	2,454.0	9.9
Effect of exchange rate changes on cash	(0.2)	(5.3)
Change in cash and cash equivalents	2,561.1	31.9
Cash and cash equivalents—beginning of period	673.1	199.5
Cash and cash equivalents—end of period	$ 3,234.2	$ 231.4