Guarantor Financial Information (Condensed Consolidating Statement of Cash Flows) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net cash (used in) provided by continuing operating activities	$ 347.2	$ 377.5	$ 257.4
Net cash (used in) provided by discontinued operating activities	0.0	0.0	(0.4)
Net cash provided by (used in) operating activities	347.2	377.5	257.0
Cash flows from investing activities:
Capital expenditures	(49.3)	(42.5)	(35.2)
Acquisition of businesses, net of cash acquired	(20.8)	(31.4)	(511.3)
Proceeds from sale of property, plant and equipment	3.1	0.1	0.3
Proceeds from Sale of Equity Method Investments	15.6	0.0	0.0
Proceeds from Sale and Maturity of Marketable Securities	0.0	14.1	12.3
Proceeds from Divestiture of Businesses	(1.2)	(4.3)	(0.1)
Other investing activities, net		0.1
Net cash provided by (used in) investing activities	(50.2)	(64.0)	(533.8)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Net proceeds (repayments) in debt	10.1	(64.4)	278.3
Debt issuance costs	(9.5)	(0.3)	(9.0)
Redemption Premium	(33.2)	0.0	0.0
Net Intercompany Proceeds Payments	0.0	0.0	0.0
Payments of Ordinary Dividends, Common Stock	(60.9)	(46.0)	(38.3)
Payments of Ordinary Dividends, Noncontrolling Interest	1.8	2.7	20.0
Payments of Dividends	0.0	0.0	0.0
Proceeds shares issued under incentive plans	7.2	5.8	11.0
Payments to Acquire Interest in Subsidiaries and Affiliates		3.3
Repurchase of ordinary shares	(60.0)	(85.1)	(30.0)
Other, net	(2.8)		3.0
Net cash (used in) provided by continuing financing activities	(150.9)	(196.0)	195.0
Effect of exchange rate changes on cash and cash equivalents	7.7	(4.8)	(9.0)
Net (decrease) increase in cash and cash equivalents	153.8	112.7	(90.8)
Cash and cash equivalents - beginning of period	312.4	199.7	290.5
Cash and cash equivalents - end of period	466.2	312.4	199.7
Parent Company [Member]
Net cash (used in) provided by continuing operating activities		(25.6)	(23.4)
Net cash (used in) provided by discontinued operating activities			0.0
Net cash provided by (used in) operating activities	581.3		(23.4)
Cash flows from investing activities:
Capital expenditures	0.0	0.0	0.0
Acquisition of businesses, net of cash acquired	0.0	0.0	0.0
Proceeds from sale of property, plant and equipment	0.0		0.0
Proceeds from Sale of Equity Method Investments	0.0
Proceeds from Sale and Maturity of Marketable Securities		0.0	0.0
Proceeds from Divestiture of Businesses	0.0	0.0	0.0
Other investing activities, net		0.0
Net cash provided by (used in) investing activities	0.0	0.0	0.0
Net Cash Provided by (Used in) Financing Activities [Abstract]
Net proceeds (repayments) in debt	(488.5)	(47.0)	263.8
Debt issuance costs	(4.0)	(0.3)	(9.0)
Redemption Premium	(24.6)
Net Intercompany Proceeds Payments	49.7	195.4	(200.9)
Payments of Ordinary Dividends, Common Stock	(60.9)	(46.0)	(38.3)
Payments of Ordinary Dividends, Noncontrolling Interest	0.0	0.0	0.0
Payments of Dividends	0.0	0.0	0.0
Proceeds shares issued under incentive plans	7.2	5.8	11.0
Payments to Acquire Interest in Subsidiaries and Affiliates		0.0
Repurchase of ordinary shares	(60.0)	(85.1)	(30.0)
Other, net	0.0		3.0
Net cash (used in) provided by continuing financing activities	(581.1)	22.8	(0.4)
Effect of exchange rate changes on cash and cash equivalents	0.0	0.0	0.0
Net (decrease) increase in cash and cash equivalents	0.2	(2.8)	(23.8)
Cash and cash equivalents - beginning of period	0.5	3.3	27.1
Cash and cash equivalents - end of period	0.7	0.5	3.3
Other Subsidiaries [Member]
Net cash (used in) provided by continuing operating activities		528.9	416.5
Net cash (used in) provided by discontinued operating activities			(0.4)
Net cash provided by (used in) operating activities	510.2		416.1
Cash flows from investing activities:
Capital expenditures	(49.3)	(42.5)	(35.2)
Acquisition of businesses, net of cash acquired	(20.8)	(31.4)	(511.3)
Proceeds from sale of property, plant and equipment	3.1		0.3
Proceeds from Sale of Equity Method Investments	15.6
Proceeds from Sale and Maturity of Marketable Securities		14.1	12.3
Proceeds from Divestiture of Businesses	(1.2)	(4.3)	(0.1)
Other investing activities, net		0.1
Net cash provided by (used in) investing activities	(50.2)	(64.0)	(533.8)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Net proceeds (repayments) in debt	(1.4)	(17.4)	14.5
Debt issuance costs	0.0	0.0	0.0
Redemption Premium	0.0
Net Intercompany Proceeds Payments	473.3	(161.1)	326.9
Payments of Ordinary Dividends, Common Stock	0.0	0.0	0.0
Payments of Ordinary Dividends, Noncontrolling Interest	1.8	2.7	20.0
Payments of Dividends	(784.3)	(159.9)	(261.5)
Proceeds shares issued under incentive plans	0.0	0.0	0.0
Payments to Acquire Interest in Subsidiaries and Affiliates		3.3
Repurchase of ordinary shares	0.0	0.0	0.0
Other, net	0.0		0.0
Net cash (used in) provided by continuing financing activities	(314.2)	(344.4)	59.9
Effect of exchange rate changes on cash and cash equivalents	7.7	(4.8)	(9.0)
Net (decrease) increase in cash and cash equivalents	153.5	115.7	(66.8)
Cash and cash equivalents - beginning of period	311.8	196.1	262.9
Cash and cash equivalents - end of period	465.3	311.8	196.1
Subsidiary Issuer [Member]
Net cash (used in) provided by continuing operating activities		34.1	125.8
Net cash (used in) provided by discontinued operating activities			0.0
Net cash provided by (used in) operating activities	40.0		125.8
Cash flows from investing activities:
Capital expenditures	0.0	0.0	0.0
Acquisition of businesses, net of cash acquired	0.0	0.0	0.0
Proceeds from sale of property, plant and equipment	0.0		0.0
Proceeds from Sale of Equity Method Investments	0.0
Proceeds from Sale and Maturity of Marketable Securities		0.0	0.0
Proceeds from Divestiture of Businesses	0.0	0.0	0.0
Other investing activities, net		0.0
Net cash provided by (used in) investing activities	0.0	0.0	0.0
Net Cash Provided by (Used in) Financing Activities [Abstract]
Net proceeds (repayments) in debt	500.0	0.0	0.0
Debt issuance costs	(5.5)	0.0	0.0
Redemption Premium	(8.6)
Net Intercompany Proceeds Payments	(523.0)	(34.3)	(126.0)
Payments of Ordinary Dividends, Common Stock	0.0	0.0	0.0
Payments of Ordinary Dividends, Noncontrolling Interest	0.0	0.0	0.0
Payments of Dividends	0.0	0.0	0.0
Proceeds shares issued under incentive plans	0.0	0.0	0.0
Payments to Acquire Interest in Subsidiaries and Affiliates		0.0
Repurchase of ordinary shares	0.0	0.0	0.0
Other, net	(2.8)		0.0
Net cash (used in) provided by continuing financing activities	(39.9)	(34.3)	(126.0)
Effect of exchange rate changes on cash and cash equivalents	0.0	0.0	0.0
Net (decrease) increase in cash and cash equivalents	0.1	(0.2)	(0.2)
Cash and cash equivalents - beginning of period	0.1	0.3	0.5
Cash and cash equivalents - end of period	0.2	0.1	0.3
Consolidation, Eliminations [Member]
Net cash (used in) provided by continuing operating activities		(159.9)	(261.5)
Net cash (used in) provided by discontinued operating activities
Net cash provided by (used in) operating activities	(784.3)		(261.5)
Cash flows from investing activities:
Capital expenditures	0.0	0.0	0.0
Acquisition of businesses, net of cash acquired	0.0	0.0	0.0
Proceeds from sale of property, plant and equipment	0.0		0.0
Proceeds from Sale of Equity Method Investments	0.0
Proceeds from Sale and Maturity of Marketable Securities		0.0	0.0
Proceeds from Divestiture of Businesses	0.0	0.0	0.0
Other investing activities, net		0.0
Net cash provided by (used in) investing activities	0.0	0.0	0.0
Net Cash Provided by (Used in) Financing Activities [Abstract]
Net proceeds (repayments) in debt	0.0	0.0	0.0
Debt issuance costs	0.0	0.0	0.0
Redemption Premium	0.0
Net Intercompany Proceeds Payments	0.0	0.0	0.0
Payments of Ordinary Dividends, Common Stock	0.0	0.0	0.0
Payments of Ordinary Dividends, Noncontrolling Interest	0.0	0.0	0.0
Payments of Dividends	784.3	159.9	261.5
Proceeds shares issued under incentive plans	0.0	0.0	0.0
Payments to Acquire Interest in Subsidiaries and Affiliates		0.0
Repurchase of ordinary shares	0.0	0.0	0.0
Other, net	0.0		0.0
Net cash (used in) provided by continuing financing activities	784.3	159.9	261.5
Effect of exchange rate changes on cash and cash equivalents	0.0	0.0	0.0
Net (decrease) increase in cash and cash equivalents	0.0	0.0	0.0
Cash and cash equivalents - beginning of period	0.0	0.0	0.0
Cash and cash equivalents - end of period	$ 0.0	$ 0.0	$ 0.0