Financial Statements of Parent Company Guarantor - Condensed Consolidating Statement of Cash Flows (Detail) - USD ($) $ in Millions	3 Months Ended										9 Months Ended		12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Jun. 27, 2015	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Revenue, Net	$ 1,260.9	$ 1,226.8	$ 1,265.3	$ 1,183.5	$ 1,188.1	$ 1,210.7	$ 1,301.2	$ 1,190.0					$ 4,936.5	$ 4,890.0	$ 4,616.4
Operating activities
Net cash provided by (used for) operating activities													620.2	861.4	739.3
Investing activities
Capital expenditures													(70.9)	(117.8)	(91.3)
Proceeds from sale of property and equipment													7.9	24.7	4.6
Proceeds from sale of businesses, net											$ 2,759.4	$ (5.2)	2,759.4	(5.2)	(3.0)	$ (3.0)
Acquisitions, net of cash acquired					(25.0)				$ (0.9)	$ (96.0)			(59.5)	(25.0)	(1,913.9)
Intercompany Loan Activity, Net													0.0		0.0
Net cash provided by (used for) investing activities of continuing operations													2,636.9	(123.3)	(2,003.6)
Net cash provided by (used for) investing activities of discontinued operations													(6.5)	1.5	38.1
Net cash provided by (used for) investing activities													2,630.4	(121.8)	(1,965.5)
Financing activities
Net receipts (repayments) of short-term borrowings													(0.8)	0.8	(2.3)
Net receipts (repayments) of commercial paper and revolving long-term debt													(913.1)	(385.3)	363.5
Proceeds from long-term debt													0.0	0.0	1,714.8
Repayment of long-term debt													(2,009.3)	(0.7)	(356.6)
Debt issuance costs													0.0	0.0	(26.8)
Payment for Debt Extinguishment or Debt Prepayment Cost													(94.9)	0.0	0.0
Net change in advances to subsidiaries													0.0	0.0	0.0
Excess tax benefits from share-based compensation													0.0	8.0	6.0
Shares issued to employees, net of shares withheld													37.2	20.7	19.4
Repurchases of ordinary shares													(200.0)	0.0	(200.0)
Dividends paid													(251.7)	(243.6)	(231.7)
Net cash provided by (used for) financing activities													(3,432.6)	(600.1)	1,286.3
Effect of exchange rate changes on cash and cash equivalents													56.8	(27.3)	(44.2)
Change in cash and cash equivalents													(125.2)	112.2	15.9
Cash and cash equivalents, beginning of year				238.5				126.3			238.5	126.3	238.5	126.3	110.4
Cash and cash equivalents, end of year	113.3				238.5				126.3				113.3	238.5	126.3	110.4
Cost of goods sold													3,107.4	3,095.9	3,017.6
Gross profit	468.3	455.3	483.2	422.3	440.1	440.9	481.8	431.3					1,829.1	1,794.1	1,598.8
Selling, General and Administrative Expense													1,032.5	979.3	884.0
Research and Development Expense													115.8	114.1	98.7
Impairment of goodwill and trade names													32.0	13.3	0.0
Operating Income (Loss)	137.4	$ 192.2	$ 212.8	138.4	161.8	$ 182.8	$ 203.4	152.7					680.8	700.7	616.1
Parent Company Guarantor
Condensed Financial Statements, Captions [Line Items]
Revenue, Net													0.0	0.0	0.0
Operating activities
Net cash provided by (used for) operating activities													677.0	522.7	(43.0)
Investing activities
Capital expenditures													0.0	0.0	0.0
Proceeds from sale of property and equipment													0.0	0.0	0.0
Proceeds from sale of businesses, net													0.0	0.0	0.0
Acquisitions, net of cash acquired													0.0	0.0	0.0
Intercompany Loan Activity, Net													0.0	0.0	0.0
Net cash provided by (used for) investing activities of continuing operations													0.0	0.0	0.0
Net cash provided by (used for) investing activities of discontinued operations													0.0	0.0	0.0
Net cash provided by (used for) investing activities													0.0	0.0	0.0
Financing activities
Net receipts (repayments) of short-term borrowings													0.0	0.0	0.0
Net receipts (repayments) of commercial paper and revolving long-term debt													0.0	0.0	0.0
Proceeds from long-term debt															0.0
Repayment of long-term debt													0.0	0.0	0.0
Debt issuance costs															0.0
Payment for Debt Extinguishment or Debt Prepayment Cost													0.0
Net change in advances to subsidiaries													(262.5)	(299.8)	471.7
Excess tax benefits from share-based compensation														0.0	0.0
Shares issued to employees, net of shares withheld													37.2	20.7	3.0
Repurchases of ordinary shares													(200.0)		(200.0)
Dividends paid													(251.7)	(243.6)	(231.7)
Net cash provided by (used for) financing activities													(677.0)	(522.7)	43.0
Effect of exchange rate changes on cash and cash equivalents													0.0	0.0	0.0
Change in cash and cash equivalents													0.0	0.0	0.0
Cash and cash equivalents, beginning of year				0.0				0.0			0.0	0.0	0.0	0.0	0.0
Cash and cash equivalents, end of year	0.0				0.0				0.0				0.0	0.0	0.0	0.0
Cost of goods sold													0.0	0.0	0.0
Gross profit													0.0	0.0	0.0
Selling, General and Administrative Expense													4.1	15.8	33.7
Research and Development Expense													0.0	0.0	0.0
Operating Income (Loss)													(4.1)	(15.8)	(33.7)
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Revenue, Net													0.0	0.0	0.0
Operating activities
Net cash provided by (used for) operating activities													670.6	463.1	(48.7)
Investing activities
Capital expenditures													0.0	0.0	0.0
Proceeds from sale of property and equipment													0.0	0.0	0.0
Proceeds from sale of businesses, net													0.0	0.0	0.0
Acquisitions, net of cash acquired													0.0	0.0	0.0
Intercompany Loan Activity, Net													(58.9)	0.0	0.0
Net cash provided by (used for) investing activities of continuing operations													(58.9)	0.0	0.0
Net cash provided by (used for) investing activities of discontinued operations													0.0	0.0	0.0
Net cash provided by (used for) investing activities													(58.9)	0.0	0.0
Financing activities
Net receipts (repayments) of short-term borrowings													0.0	0.0	0.0
Net receipts (repayments) of commercial paper and revolving long-term debt													0.0	0.0	0.0
Proceeds from long-term debt															0.0
Repayment of long-term debt													0.0	0.0	0.0
Debt issuance costs															0.0
Payment for Debt Extinguishment or Debt Prepayment Cost													0.0
Net change in advances to subsidiaries													(611.7)	(463.1)	48.7
Excess tax benefits from share-based compensation														0.0	0.0
Shares issued to employees, net of shares withheld													0.0	0.0	0.0
Repurchases of ordinary shares													0.0		0.0
Dividends paid													0.0	0.0	0.0
Net cash provided by (used for) financing activities													(611.7)	(463.1)	48.7
Effect of exchange rate changes on cash and cash equivalents													0.0	0.0	0.0
Change in cash and cash equivalents													0.0	0.0	0.0
Cash and cash equivalents, beginning of year				0.0				0.0			0.0	0.0	0.0	0.0	0.0
Cash and cash equivalents, end of year	0.0				0.0				0.0				0.0	0.0	0.0	0.0
Cost of goods sold													0.0	0.0	0.0
Gross profit													0.0	0.0	0.0
Selling, General and Administrative Expense													0.6	0.0	2.2
Research and Development Expense													0.0	0.0	0.0
Operating Income (Loss)													(0.6)	0.0	(2.2)
Subsidiary Issuer
Condensed Financial Statements, Captions [Line Items]
Revenue, Net													0.0	0.0	0.0
Operating activities
Net cash provided by (used for) operating activities													661.3	469.5	(5.8)
Investing activities
Capital expenditures													0.0	0.0	0.0
Proceeds from sale of property and equipment													0.0	0.0	0.0
Proceeds from sale of businesses, net													2,765.6	0.0	0.0
Acquisitions, net of cash acquired													0.0	0.0	0.0
Intercompany Loan Activity, Net													103.7	667.3	891.0
Net cash provided by (used for) investing activities of continuing operations													2,869.3	667.3	891.0
Net cash provided by (used for) investing activities of discontinued operations													0.0	0.0	0.0
Net cash provided by (used for) investing activities													2,869.3	667.3	891.0
Financing activities
Net receipts (repayments) of short-term borrowings													0.0	0.0	0.0
Net receipts (repayments) of commercial paper and revolving long-term debt													(914.7)	(385.8)	346.9
Proceeds from long-term debt															1,714.8
Repayment of long-term debt													(1,917.8)	0.0	(350.0)
Debt issuance costs															(26.8)
Payment for Debt Extinguishment or Debt Prepayment Cost													(86.0)
Net change in advances to subsidiaries													(685.9)	(778.9)	(2,553.7)
Excess tax benefits from share-based compensation														0.0	0.0
Shares issued to employees, net of shares withheld													0.0	0.0	0.0
Repurchases of ordinary shares													0.0		0.0
Dividends paid													0.0	0.0	0.0
Net cash provided by (used for) financing activities													(3,604.4)	(1,164.7)	(868.8)
Effect of exchange rate changes on cash and cash equivalents													73.8	27.8	(16.4)
Change in cash and cash equivalents													0.0	(0.1)	0.0
Cash and cash equivalents, beginning of year				0.0				0.1			0.0	0.1	0.0	0.1	0.1
Cash and cash equivalents, end of year	0.0				0.0				0.1				0.0	0.0	0.1	0.1
Cost of goods sold													0.0	0.0	0.0
Gross profit													0.0	0.0	0.0
Selling, General and Administrative Expense													0.0	1.2	5.3
Research and Development Expense													0.0	0.0	0.0
Operating Income (Loss)													0.0	(1.2)	(5.3)
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Revenue, Net													4,936.5	4,890.0	4,616.4
Operating activities
Net cash provided by (used for) operating activities													781.0	916.2	767.1
Investing activities
Capital expenditures													(70.9)	(117.8)	(91.3)
Proceeds from sale of property and equipment													7.9	24.7	4.6
Proceeds from sale of businesses, net													(6.2)	(5.2)	(3.0)
Acquisitions, net of cash acquired													(59.5)	(25.0)	(1,913.9)
Intercompany Loan Activity, Net													172.6	(191.0)	(295.0)
Net cash provided by (used for) investing activities of continuing operations													43.9	(314.3)	(2,298.6)
Net cash provided by (used for) investing activities of discontinued operations													(6.5)	1.5	38.1
Net cash provided by (used for) investing activities													37.4	(312.8)	(2,260.5)
Financing activities
Net receipts (repayments) of short-term borrowings													(0.8)	0.8	(2.3)
Net receipts (repayments) of commercial paper and revolving long-term debt													1.6	0.5	16.6
Proceeds from long-term debt															0.0
Repayment of long-term debt													(91.5)	(0.7)	(6.6)
Debt issuance costs															0.0
Payment for Debt Extinguishment or Debt Prepayment Cost													(8.9)
Net change in advances to subsidiaries													(827.0)	(444.6)	1,507.0
Excess tax benefits from share-based compensation														8.0	6.0
Shares issued to employees, net of shares withheld													0.0	0.0	16.4
Repurchases of ordinary shares													0.0		0.0
Dividends paid													0.0	0.0	0.0
Net cash provided by (used for) financing activities													(926.6)	(436.0)	1,537.1
Effect of exchange rate changes on cash and cash equivalents													(17.0)	(55.1)	(27.8)
Change in cash and cash equivalents													(125.2)	112.3	15.9
Cash and cash equivalents, beginning of year				238.5				126.2			238.5	126.2	238.5	126.2	110.3
Cash and cash equivalents, end of year	113.3				238.5				126.2				113.3	238.5	126.2	110.3
Cost of goods sold													3,107.4	3,095.9	3,017.6
Gross profit													1,829.1	1,794.1	1,598.8
Selling, General and Administrative Expense													1,027.8	962.3	842.8
Research and Development Expense													115.8	114.1	98.7
Operating Income (Loss)													685.5	717.7	657.3
Eliminations
Condensed Financial Statements, Captions [Line Items]
Revenue, Net													0.0	0.0	0.0
Operating activities
Net cash provided by (used for) operating activities													(2,169.7)	(1,510.1)	69.7
Investing activities
Capital expenditures													0.0	0.0	0.0
Proceeds from sale of property and equipment													0.0	0.0	0.0
Proceeds from sale of businesses, net													0.0	0.0	0.0
Acquisitions, net of cash acquired													0.0	0.0	0.0
Intercompany Loan Activity, Net													(217.4)	(476.3)	(596.0)
Net cash provided by (used for) investing activities of continuing operations													(217.4)	(476.3)	(596.0)
Net cash provided by (used for) investing activities of discontinued operations													0.0	0.0	0.0
Net cash provided by (used for) investing activities													(217.4)	(476.3)	(596.0)
Financing activities
Net receipts (repayments) of short-term borrowings													0.0	0.0	0.0
Net receipts (repayments) of commercial paper and revolving long-term debt													0.0	0.0	0.0
Proceeds from long-term debt															0.0
Repayment of long-term debt													0.0	0.0	0.0
Debt issuance costs															0.0
Payment for Debt Extinguishment or Debt Prepayment Cost													0.0
Net change in advances to subsidiaries													2,387.1	1,986.4	526.3
Excess tax benefits from share-based compensation														0.0	0.0
Shares issued to employees, net of shares withheld													0.0	0.0	0.0
Repurchases of ordinary shares													0.0		0.0
Dividends paid													0.0	0.0	0.0
Net cash provided by (used for) financing activities													2,387.1	1,986.4	526.3
Effect of exchange rate changes on cash and cash equivalents													0.0	0.0	0.0
Change in cash and cash equivalents													0.0	0.0	0.0
Cash and cash equivalents, beginning of year				$ 0.0				$ 0.0			$ 0.0	$ 0.0	0.0	0.0	0.0
Cash and cash equivalents, end of year	$ 0.0				$ 0.0				$ 0.0				0.0	0.0	0.0	$ 0.0
Cost of goods sold													0.0	0.0	0.0
Gross profit													0.0	0.0	0.0
Selling, General and Administrative Expense													0.0	0.0	0.0
Research and Development Expense													0.0	0.0	0.0
Operating Income (Loss)													$ 0.0	$ 0.0	$ 0.0