Financial Statements of Parent Company Guarantor - Condensed Consolidating Statement of Cash Flows (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating activities
Net cash provided by (used for) operating activities	$ 361.8	$ 556.8
Investing activities
Capital expenditures	(50.5)	(94.5)
Proceeds from sale of property and equipment	7.1	24.1
Proceeds from Divestiture of Businesses, Net of Cash Divested	2,764.0
Acquisitions, net of cash acquired	(59.5)	0.0
Intercompany Loan Activity, Net	0.0	0.0
Payments for (Proceeds from) Other Investing Activities	0.0	3.8
Net cash provided by (used for) investing activities of continuing operations	2,661.1	(74.2)
Net cash provided by (used for) investing activities of discontinued operations	(6.5)	(4.3)
Net cash provided by (used for) investing activities	2,654.6	(78.5)
Financing activities
Net repayments of short-term borrowings	(0.8)	0.0
Proceeds from (Repayments of) Lines of Credit	(842.3)	(291.1)
Repayments of long-term debt	(2,009.3)	(0.7)
Premium paid on early extinguishment of debt	(94.9)	0.0
Net change in advances to subsidiaries	0.0	0.0
Excess tax benefits from share-based compensation	0.0	8.8
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options	34.3	20.1
Repurchases of ordinary shares	(100.0)	0.0
Dividends paid	(188.9)	(181.6)
Net cash provided by (used for) financing activities	(3,201.9)	(444.5)
Effect of exchange rate changes on cash and cash equivalents	55.5	10.8
Change in cash and cash equivalents	(130.0)	44.6
Cash and cash equivalents, beginning of period	238.5	126.3
Cash and cash equivalents, end of period	108.5	170.9
Parent Company Guarantor
Operating activities
Net cash provided by (used for) operating activities	356.3	364.1
Investing activities
Capital expenditures	0.0	0.0
Proceeds from sale of property and equipment	0.0	0.0
Proceeds from Divestiture of Businesses, Net of Cash Divested	0.0
Acquisitions, net of cash acquired	0.0
Intercompany Loan Activity, Net	0.0	0.0
Payments for (Proceeds from) Other Investing Activities		0.0
Net cash provided by (used for) investing activities of continuing operations	0.0	0.0
Net cash provided by (used for) investing activities of discontinued operations	0.0	0.0
Net cash provided by (used for) investing activities	0.0	0.0
Financing activities
Net repayments of short-term borrowings	0.0
Proceeds from (Repayments of) Lines of Credit	0.0	0.0
Repayments of long-term debt	0.0	0.0
Premium paid on early extinguishment of debt	0.0
Net change in advances to subsidiaries	(101.6)	(202.6)
Excess tax benefits from share-based compensation		0.0
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options	34.3	20.1
Repurchases of ordinary shares	(100.0)
Dividends paid	(188.9)	(181.6)
Net cash provided by (used for) financing activities	(356.2)	(364.1)
Effect of exchange rate changes on cash and cash equivalents	0.0	0.0
Change in cash and cash equivalents	0.1	0.0
Cash and cash equivalents, beginning of period	0.0	0.0
Cash and cash equivalents, end of period	0.1	0.0
Guarantor Subsidiary [Member]
Operating activities
Net cash provided by (used for) operating activities	475.5	327.7
Investing activities
Capital expenditures	0.0	0.0
Proceeds from sale of property and equipment	0.0	0.0
Proceeds from Divestiture of Businesses, Net of Cash Divested	0.0
Acquisitions, net of cash acquired	0.0
Intercompany Loan Activity, Net	0.0	0.0
Payments for (Proceeds from) Other Investing Activities		0.0
Net cash provided by (used for) investing activities of continuing operations	0.0	0.0
Net cash provided by (used for) investing activities of discontinued operations	0.0	0.0
Net cash provided by (used for) investing activities	0.0	0.0
Financing activities
Net repayments of short-term borrowings	0.0
Proceeds from (Repayments of) Lines of Credit	0.0	0.0
Repayments of long-term debt	0.0	0.0
Premium paid on early extinguishment of debt	0.0
Net change in advances to subsidiaries	(475.5)	(327.7)
Excess tax benefits from share-based compensation		0.0
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options	0.0	0.0
Repurchases of ordinary shares	0.0
Dividends paid	0.0	0.0
Net cash provided by (used for) financing activities	(475.5)	(327.7)
Effect of exchange rate changes on cash and cash equivalents	0.0	0.0
Change in cash and cash equivalents	0.0	0.0
Cash and cash equivalents, beginning of period	0.0	0.0
Cash and cash equivalents, end of period	0.0	0.0
Subsidiary Issuer
Operating activities
Net cash provided by (used for) operating activities	458.0	327.1
Investing activities
Capital expenditures	0.0	0.0
Proceeds from sale of property and equipment	0.0	0.0
Proceeds from Divestiture of Businesses, Net of Cash Divested	2,765.6
Acquisitions, net of cash acquired	0.0
Intercompany Loan Activity, Net	119.4	497.9
Payments for (Proceeds from) Other Investing Activities		0.0
Net cash provided by (used for) investing activities of continuing operations	2,885.0	497.9
Net cash provided by (used for) investing activities of discontinued operations	0.0	0.0
Net cash provided by (used for) investing activities	2,885.0	497.9
Financing activities
Net repayments of short-term borrowings	0.0
Proceeds from (Repayments of) Lines of Credit	(832.7)	(280.2)
Repayments of long-term debt	(1,917.8)	0.0
Premium paid on early extinguishment of debt	(86.0)
Net change in advances to subsidiaries	(572.9)	(557.1)
Excess tax benefits from share-based compensation		0.0
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options	0.0	0.0
Repurchases of ordinary shares	0.0
Dividends paid	0.0	0.0
Net cash provided by (used for) financing activities	(3,409.4)	(837.3)
Effect of exchange rate changes on cash and cash equivalents	66.7	12.2
Change in cash and cash equivalents	0.3	(0.1)
Cash and cash equivalents, beginning of period	0.0	0.1
Cash and cash equivalents, end of period	0.3	0.0
Non-Guarantor Subsidiaries
Operating activities
Net cash provided by (used for) operating activities	654.1	653.9
Investing activities
Capital expenditures	(50.5)	(94.5)
Proceeds from sale of property and equipment	7.1	24.1
Proceeds from Divestiture of Businesses, Net of Cash Divested	(1.6)
Acquisitions, net of cash acquired	(59.5)
Intercompany Loan Activity, Net	135.9	(193.9)
Payments for (Proceeds from) Other Investing Activities		3.8
Net cash provided by (used for) investing activities of continuing operations	31.4	(268.1)
Net cash provided by (used for) investing activities of discontinued operations	(6.5)	(4.3)
Net cash provided by (used for) investing activities	24.9	(272.4)
Financing activities
Net repayments of short-term borrowings	(0.8)
Proceeds from (Repayments of) Lines of Credit	(9.6)	(10.9)
Repayments of long-term debt	(91.5)	(0.7)
Premium paid on early extinguishment of debt	(8.9)
Net change in advances to subsidiaries	(687.4)	(332.6)
Excess tax benefits from share-based compensation		8.8
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options	0.0	0.0
Repurchases of ordinary shares	0.0
Dividends paid	0.0	0.0
Net cash provided by (used for) financing activities	(798.2)	(335.4)
Effect of exchange rate changes on cash and cash equivalents	(11.2)	(1.4)
Change in cash and cash equivalents	(130.4)	44.7
Cash and cash equivalents, beginning of period	238.5	126.2
Cash and cash equivalents, end of period	108.1	170.9
Consolidation, Eliminations [Member]
Operating activities
Net cash provided by (used for) operating activities	(1,582.1)	(1,116.0)
Investing activities
Capital expenditures	0.0	0.0
Proceeds from sale of property and equipment	0.0	0.0
Proceeds from Divestiture of Businesses, Net of Cash Divested	0.0
Acquisitions, net of cash acquired	0.0
Intercompany Loan Activity, Net	(255.3)	(304.0)
Payments for (Proceeds from) Other Investing Activities		0.0
Net cash provided by (used for) investing activities of continuing operations	(255.3)	(304.0)
Net cash provided by (used for) investing activities of discontinued operations	0.0	0.0
Net cash provided by (used for) investing activities	(255.3)	(304.0)
Financing activities
Net repayments of short-term borrowings	0.0
Proceeds from (Repayments of) Lines of Credit	0.0	0.0
Repayments of long-term debt	0.0	0.0
Premium paid on early extinguishment of debt	0.0
Net change in advances to subsidiaries	1,837.4	1,420.0
Excess tax benefits from share-based compensation		0.0
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options	0.0	0.0
Repurchases of ordinary shares	0.0
Dividends paid	0.0	0.0
Net cash provided by (used for) financing activities	1,837.4	1,420.0
Effect of exchange rate changes on cash and cash equivalents	0.0	0.0
Change in cash and cash equivalents	0.0	0.0
Cash and cash equivalents, beginning of period	0.0	0.0
Cash and cash equivalents, end of period	$ 0.0	$ 0.0