Derivative Instruments (Tables)

12 Months Ended

Dec. 31, 2012

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Fair values for derivatives

The fair values, balance sheet presentation, and the hedge designation status of derivative instruments at December 31, 2012 and 2011 are presented in the table below:

		Fair Value (Level 2) as of
(in millions)	Balance Sheet Location	December 31, 2012		December 31, 2011
Asset Derivatives
Interest rate swaps — designated as hedge	Deferred charges and other assets	$	17.0	$	3.3

Income statement impact of derivative instruments not designated as hedging instruments

The income statement impact of derivatives for the years ended December 31, 2012 and 2011 are presented in the table below:

	Location of Gain (Loss) Recognized in Income	Amount of Gain (Loss) Recognized in Income on Derivatives
(in millions)	on Derivatives	2012		2011			2010
Designated as hedges
Interest rate swaps	Interest expense	$	7.0	$	1.6		$	—
Not designated as hedges
Forward exchange contracts	Other operating (income) expense, net	0.8		0.5			1.3
Currency swap contracts	Other non-operating (income) expense, net	—		(1.8		)	(5.9		)
Total		$	7.8	$	0.3		$	(4.6	)