Reclassification out of AOCI (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flow and net investment hedges, net of tax:
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax	$ 1.4	$ (0.2)
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax	(0.6)	0.1
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax	0.8	(0.1)
Pension and Other Post-Retirement Benefits, net of tax:
Amortization Of Actuarial Losses And Prior Service Costs Included In Net Income Pre Tax	3.1	2.8
Amortization Of Actuarial Losses And Prior Service Costs Included In Net Income Tax	(1.2)	(1.1)
Amortization Of Actuarial Losses And Prior Service Costs Included In Net Income Net Of Tax	1.9	1.7
Total Reclassifications	2.3
Selling, General and Administrative Expenses [Member]
Pension and Other Post-Retirement Benefits, net of tax:
Amortization Of Actuarial Losses Reclassified From AOCI	(1.0)
Operating Expense [Member]
Pension and Other Post-Retirement Benefits, net of tax:
Amortization Of Actuarial Losses Reclassified From AOCI	(2.1)
IncomeTaxMember [Member]
Cash flow and net investment hedges, net of tax:
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax	0.2
Pension and Other Post-Retirement Benefits, net of tax:
Amortization Of Actuarial Losses And Prior Service Costs Included In Net Income Tax	1.2
Interest Rate Swap [Member] | Interest Expense [Member]
Cash flow and net investment hedges, net of tax:
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax	$ (0.6)