Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019
Operating Activities
Net income	$ 175.9	$ 179.9
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	58.3	54.7
Stock-based compensation	16.2	17.7
Changes in operating assets and liabilities excluding the effect of business acquired:
Accounts receivable and unbilled receivables	0.5	(36.6)
Inventories	(6.0)	(10.1)
Accounts payable	(20.4)	(7.8)
Deferred and income taxes receivable/payable, net	28.3	(4.5)
Prepaid expenses and other assets	10.5	(16.0)
Accrued expenses and other liabilities	(35.5)	(14.7)
Other operating, net	4.4	0.7
Net cash provided by operating activities	232.2	163.3
Investing Activities
Purchases of property, plant and equipment	(36.8)	(39.4)
Purchase of businesses, net of cash acquired	(29.0)	(222.5)
Other investing, net	0.1	0.3
Net cash used in investing activities	(65.7)	(261.6)
Financing Activities
Net proceeds from credit facility		47.5
Net payments on other debt	(0.4)	(2.2)
Proceeds from exercise of stock options	28.2	20.7
Other financing, net		(1.4)
Net cash provided by financing activities	27.8	64.6
Effect of exchange rate changes on cash	(11.0)	(0.7)
Change in cash and cash equivalents	183.3	(34.4)
Cash and cash equivalents—beginning of period	199.5	142.5
Cash and cash equivalents—end of period	$ 382.8	$ 108.1