Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Operating activities
Net income	$ 132.1	$ 128.6	$ 72.1	$ 72.7	$ 260.7	$ 144.8
Loss from discontinued operations, net of tax					3.0	1.7
Adjustments to reconcile net income from continuing operations to net cash provided by (used for) operating activities of continuing operations
Equity income of unconsolidated subsidiaries					(0.1)	(0.3)
Depreciation					25.5	22.8
Amortization	6.3		7.0		13.4	14.6
Deferred income taxes					(4.3)	13.4
Loss on sale of businesses	0.0		0.1		0.0	0.1
Share-based compensation	11.0		4.2		16.6	10.4
Changes in assets and liabilities, net of effects of business acquisitions
Accounts receivable					(49.8)	103.1
Inventories					(31.9)	(17.7)
Other current assets					(10.5)	(14.5)
Accounts payable					51.3	(64.2)
Employee compensation and benefits					9.4	7.5
Other current liabilities					78.7	44.9
Other non-current assets and liabilities					(1.0)	(0.1)
Net cash provided by operating activities of continuing operations					361.0	266.5
Net cash used for operating activities of discontinued operations					(0.2)	(0.5)
Net cash provided by operating activities					360.8	266.0
Investing activities
Capital expenditures					(24.3)	(30.5)
Proceeds from sale of property and equipment					3.5	0.1
Acquisitions, net of cash acquired					(82.8)	(28.5)
Other					2.7	0.0
Net cash used for investing activities					(100.9)	(58.9)
Financing activities
Net borrowings of commercial paper and revolving long-term debt					(20.0)	(17.1)
Repayments of long-term debt					(103.8)	0.0
Shares issued to employees, net of shares withheld					4.0	7.3
Repurchases of ordinary shares					(50.0)	(115.2)
Dividends paid					(66.7)	(63.7)
Payments upon the maturity of cross currency swaps					(14.7)	0.0
Net cash used for financing activities					(251.2)	(188.7)
Effect of exchange rate changes on cash and cash equivalents					5.1	(10.3)
Change in cash and cash equivalents					13.8	8.1
Cash and cash equivalents, beginning of period		$ 82.1		$ 82.5	82.1	82.5	$ 82.5
Cash and cash equivalents, end of period	$ 95.9		$ 90.6		$ 95.9	$ 90.6	$ 82.1