Condensed Consolidated Statements of Cash Flow - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Cash from operating activities:
Net income	$ 243.2	$ 269.9
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	72.1	85.6
Stock-based compensation expense	15.4	14.4
Deferred income tax provision (benefit)	13.4	(0.7)
Net change in components of working capital	43.8	(22.7)
Net change in other long-term assets and liabilities	(3.6)	(2.9)
Net cash provided by operating activities	384.3	343.6
Cash from investing activities:
Capital expenditures	(60.8)	(74.5)
Proceeds from disposals of property, plant and equipment	1.2	4.3
Purchases of short-term investments	(12.0)	(23.1)
Sales and maturities of short-term investments	17.7	17.5
Acquisitions, net of cash acquired	(16.5)	(399.3)	$ (937.4)
Net cash used in investing activities	(70.4)	(475.1)
Cash from financing activities:
Proceeds from issuance of senior notes	399.3	499.5
Repayments of senior notes and other long-term debt	(0.3)	(757.2)
Borrowings under credit facilities	1,567.4	0.0
Repayments under credit facilities	(215.0)	0.0
(Repayments) borrowings under commercial paper programs, net	(250.4)	267.4
Payment of costs related to debt financing	(3.9)	(6.9)
Proceeds from exercise of stock options	30.0	47.5
Distributions to and purchases of noncontrolling interests	(8.1)	(3.2)
Purchase of treasury stock	(257.2)	(160.0)
Dividend payments	(74.4)	(68.7)
Net cash provided by (used in) financing activities	1,187.4	(181.6)
Effect of exchange rate changes on cash and cash equivalents	(20.2)	3.5
Net change in cash and cash equivalents	1,481.1	(309.6)
Cash and cash equivalents balance, beginning of period	891.2	1,279.3	1,279.3
Cash and cash equivalents balance, end of period	2,372.3	969.7	$ 891.2
Cash paid for:
Interest	22.0	31.6
Income taxes, net	$ 64.2	$ 104.0