Financial Statements of Parent Company Guarantor - Condensed Consolidating Statement of Cash Flows (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2017	Jun. 30, 2017	Jun. 30, 2016
Operating activities
Net cash provided by (used for) operating activities		$ 155.3	$ 369.5
Investing activities
Capital expenditures		(37.6)	(64.0)
Proceeds from sale of property and equipment		3.8	7.6
Proceeds from Divestiture of Businesses, Net of Cash Divested		2,765.6
Acquisitions, net of cash acquired	$ (59.5)	(59.5)	0.0
Intercompany Loan Activity, Net		0.0	0.0
Payments for (Proceeds from) Other Investing Activities		0.0	3.7
Net Cash Provided by (Used in) Investing Activities, Continuing Operations		2,672.3	(60.1)
Net cash provided by (used for) investing activities of discontinued operations		(6.5)	(8.0)
Net cash provided by (used for) investing activities		2,665.8	(68.1)
Financing activities
Net repayments of short-term borrowings		(0.5)	0.0
Proceeds from (Repayments of) Lines of Credit		(975.5)	(139.8)
Repayments of long-term debt		(1,659.3)	(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	3.2
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options		29.5	8.3
Payments for Repurchase of Common Stock		(100.0)	0.0
Dividends paid		(126.1)	(119.7)
Net cash provided by (used for) financing activities		(2,926.8)	(248.7)
Effect of exchange rate changes on cash and cash equivalents		45.0	(5.7)
Change in cash and cash equivalents		(60.7)	47.0
Cash and cash equivalents, beginning of period	238.5	238.5	126.3
Cash and cash equivalents, end of period		177.8	173.3
Parent Company Guarantor
Operating activities
Net cash provided by (used for) operating activities		165.8	269.2
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 in) Investing Activities, 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		(5.7)	(157.8)
Excess tax benefits from share-based compensation			0.0
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options		2.8	8.3
Payments for Repurchase of Common Stock		(100.0)
Dividends paid		(62.8)	(119.7)
Net cash provided by (used for) financing activities		(165.7)	(269.2)
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	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		347.1	241.3
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 in) Investing Activities, 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		(347.1)	(241.3)
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
Payments for Repurchase of Common Stock		0.0
Dividends paid		0.0	0.0
Net cash provided by (used for) financing activities		(347.1)	(241.3)
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	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		378.1	268.6
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		170.1	431.2
Payments for (Proceeds from) Other Investing Activities			0.0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations		2,935.7	431.2
Net cash provided by (used for) investing activities of discontinued operations		0.0	0.0
Net cash provided by (used for) investing activities		2,935.7	431.2
Financing activities
Net repayments of short-term borrowings		0.0
Proceeds from (Repayments of) Lines of Credit		(298.7)	(123.1)
Repayments of long-term debt		(1,567.8)	0.0
Premium paid on early extinguishment of debt		86.0
Net change in advances to subsidiaries		(1,356.7)	(579.5)
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
Payments for Repurchase of Common Stock		0.0
Dividends paid		0.0	0.0
Net cash provided by (used for) financing activities		(3,309.2)	(702.6)
Effect of exchange rate changes on cash and cash equivalents		46.4	2.8
Change in cash and cash equivalents		51.0	0.0
Cash and cash equivalents, beginning of period	0.0	0.0	0.1
Cash and cash equivalents, end of period		51.0	0.1
Non-Guarantor Subsidiaries
Operating activities
Net cash provided by (used for) operating activities		474.7	419.2
Investing activities
Capital expenditures		(37.6)	(64.0)
Proceeds from sale of property and equipment		3.8	7.6
Proceeds from Divestiture of Businesses, Net of Cash Divested		0.0
Acquisitions, net of cash acquired		(59.5)
Intercompany Loan Activity, Net		256.2	(65.4)
Payments for (Proceeds from) Other Investing Activities			3.7
Net Cash Provided by (Used in) Investing Activities, Continuing Operations		162.9	(125.5)
Net cash provided by (used for) investing activities of discontinued operations		(6.5)	(8.0)
Net cash provided by (used for) investing activities		156.4	(133.5)
Financing activities
Net repayments of short-term borrowings		(0.5)
Proceeds from (Repayments of) Lines of Credit		(676.8)	(16.7)
Repayments of long-term debt		(91.5)	(0.7)
Premium paid on early extinguishment of debt		8.9
Net change in advances to subsidiaries		72.8	(215.9)
Excess tax benefits from share-based compensation			3.2
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options		26.7	0.0
Payments for Repurchase of Common Stock		0.0
Dividends paid		(63.3)	0.0
Net cash provided by (used for) financing activities		(741.5)	(230.1)
Effect of exchange rate changes on cash and cash equivalents		(1.4)	(8.5)
Change in cash and cash equivalents		(111.8)	47.1
Cash and cash equivalents, beginning of period	238.5	238.5	126.2
Cash and cash equivalents, end of period		126.7	173.3
Consolidation, Eliminations [Member]
Operating activities
Net cash provided by (used for) operating activities		(1,210.4)	(828.8)
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		(426.3)	(365.8)
Payments for (Proceeds from) Other Investing Activities			0.0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations		(426.3)	(365.8)
Net cash provided by (used for) investing activities of discontinued operations		0.0	0.0
Net cash provided by (used for) investing activities		(426.3)	(365.8)
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		1,636.7	1,194.5
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
Payments for Repurchase of Common Stock		0.0
Dividends paid		0.0	0.0
Net cash provided by (used for) financing activities		1,636.7	1,194.5
Effect of exchange rate changes on cash and cash equivalents		0.0	0.0
Change in cash and cash equivalents		0.0	(0.1)
Cash and cash equivalents, beginning of period	$ 0.0	0.0	0.0
Cash and cash equivalents, end of period		$ 0.0	$ (0.1)