Reclassification out of AOCI (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Gains/(losses) on foreign currency translation adjustments
Liquidation of foreign subsidiary		$ 0.1
Total gains/(losses) on currency translation adjustments		0.1
Cash Flow Hedges, net of tax:
Losses on cash flow hedges - Pre Tax	$ 2.2
Losses on cash flow hedges - Tax	(0.8)
Losses on cash flow hedges - Net of Tax	1.4
Pension and Other Post-Retirement Benefits, net of tax:
Amortization of actuarial losses and prior service costs included in net income - Pre Tax	(2.6)	(3.8)
Amortization of actuarial losses and prior service costs included in net income - Tax	1.0	1.5
Amortization of actuarial losses and prior service costs included in net income - Net of Tax	(1.6)	(2.3)
Income Loss Attributable to Reclassification Out Of AOCI Net Of Tax	(0.2)	(2.2)
Operating Expense [Member]
Pension and Other Post-Retirement Benefits, net of tax:
Amortization of actuarial losses and prior service costs included in net income - Pre Tax	(1.6)	(2.3)
Other Nonoperating Income (Expense) [Member]
Gains/(losses) on foreign currency translation adjustments
Liquidation of foreign subsidiary		0.1
Selling, General and Administrative Expenses [Member]
Pension and Other Post-Retirement Benefits, net of tax:
Amortization of actuarial losses and prior service costs included in net income - Pre Tax	(1.0)	$ (1.5)
Cross-Currency Dervivative Contract [Member] | Other Nonoperating Income (Expense) [Member]
Cash Flow Hedges, net of tax:
Losses on cash flow hedges - Pre Tax	$ 2.2