Amounts Recognized In Statement Of Financial Position (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Pension Costs
Defined Benefit Plan Disclosure [Line Items]
Pension and Postretirement Benefits	$ (3.4)	$ (20.9)
Other Assets	3.0	0
Accumulated Other Comprehensive Loss (Income)	18.6	23.6
Net amount recognized at end of year	18.2	2.7
Accumulated benefit obligation	95.4	96.3
Nonpension Postretirement Costs
Defined Benefit Plan Disclosure [Line Items]
Pension and Postretirement Benefits	(21.8)	(30.0)
Other Assets	0	0
Accumulated Other Comprehensive Loss (Income)	(1.5)	5.1
Net amount recognized at end of year	(23.3)	(24.9)
Accumulated benefit obligation	$ 0	$ 0