Fair Value Disclosures (Tables)

12 Months Ended

Dec. 31, 2012

Fair Value Disclosures [Abstract]

Financial Assets And Liabilities Measured At Fair Value

The following table presents information about our financial assets and liabilities measured at fair value as of December 31, 2012 and 2011 under the fair value hierarchy discussed in Footnote 2, “Summary of Significant Accounting Policies and Recent Accounting Pronouncements”:

Assets and Liabilities Measured at Fair Value on a Recurring Basis

	December 31, 2012								December 31, 2011
(in millions)	Quoted  Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs  (Level 2)		Significant Unobservable Inputs (Level 3)		Total		Quoted  Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs  Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets
Deferred compensation plan investments (1)	$	35.0	$	—	$	—	$	35.0	$	41.0	$	—	$	—	$	41.0
Derivative financial instruments	—		—		—		—		—		0.1		—		0.1
Liabilities
Derivative financial instruments	$	—	$	—	$	—	$	—	$	—	$	16.6	$	—	$	16.6

(1) Approximately $12.1 million of participant cash was withdrawn from our deferred compensation plan investments during the year ended December 31, 2012.

Fair Value Of Notes Receivable And Notes Payable

The following table presents the carrying and estimated fair value of our notes payable for the years ended December 31:

	December 31, 2012				December 31, 2011
(in millions)	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
Fixed rate notes payable	$	2,297.8	$	2,518.1	$	2,186.6	$	2,304.4
Floating rate notes payable	212.7		203.4		245.5		233.6