Consolidated Statements of Cash Flow - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash from operating activities:
Net income	$ 660.7	$ 832.6	$ 772.3
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	226.8	217.0	171.6
Stock-based compensation expense	49.7	47.6	44.2
Deferred income tax provision (benefit)	186.3	(29.9)	12.9
Excess tax benefits from stock-based compensation payment arrangements		(44.4)	(16.2)
Net change in operating assets and liabilities:
Accounts receivable, net	(146.5)	(165.9)	(22.3)
Inventories	(100.4)	(14.2)	(5.2)
Other current assets	(75.9)	29.9	47.7
Accounts payable	140.5	47.8	(17.5)
Accrued income taxes	11.2	91.7	16.5
Other accrued liabilities	13.0	61.9	27.7
Accrued pension and postretirement benefits	5.0	2.5	8.7
Other long-term assets and liabilities	(173.8)	(1.0)	9.9
Net cash provided by operating activities	1,144.2	1,077.6	1,030.5
Cash from investing activities:
Capital expenditures	(226.6)	(190.8)	(172.1)
Proceeds from disposals of property, plant and equipment	4.1	7.1	8.7
Purchases of short-term investments	(40.2)	(232.4)	(134.7)
Sales and maturities of short-term investments	148.0	108.5	470.6
Acquisitions, net of cash acquired	(265.5)	(1,305.1)	(199.8)
Net cash used in investing activities	(380.2)	(1,612.7)	(27.3)
Cash from financing activities:
Proceeds from issuance of senior notes, net	749.3
Long-term borrowings under credit facilities			132.6
Repayments of long-term debt	(375.0)		(217.7)
Borrowings under commercial paper program, net	154.1	183.2	238.7
Payment of costs related to debt financing	(5.2)	(3.0)
Purchase and retirement of treasury stock	(618.0)	(325.8)	(248.9)
Proceeds from exercise of stock options	184.1	147.2	64.4
Excess tax benefits from stock-based compensation payment arrangements		44.4	16.2
Distributions to and purchases of noncontrolling interests	(24.4)	(6.8)	(6.1)
Dividend payments	(205.0)	(172.7)	(159.3)
Net cash used in financing activities	(140.1)	(133.5)	(180.1)
Effect of exchange rate changes on cash and cash equivalents	60.6	(34.0)	(54.8)
Net change in cash and cash equivalents	684.5	(702.6)	768.3
Cash and cash equivalents balance, beginning of year	1,034.6	1,737.2	968.9
Cash and cash equivalents balance, end of year	1,719.1	1,034.6	1,737.2
Cash paid during the year for:
Interest	84.3	68.5	64.1
Income taxes	$ 325.2	$ 246.8	$ 250.7