Fair Value Disclosures (Tables)

3 Months Ended

Mar. 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 on a recurring basis as of March 31, 2012 and December 31, 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

	March 31, 2012								December 31, 2011
(in millions)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets
Deferred compensation plan investments (1)	$	40.0	$	—	$	—	$	40.0	$	41.0	$	—	$	—	$	41.0
Derivative financial instruments	—		—		—		—		—		0.1		—		0.1
Liabilities
Derivative financial instruments	$	—	$	11.6	$	—	$	11.6	$	—	$	16.6	$	—	$	16.6

(1) The balance at March 31, 2012 also reflects approximately $9.3 million of participant withdrawals from our deferred compensation plan investment during the quarter.

Fair Value Of Notes Receivable And Notes Payable

The following table presents the carrying and estimated fair value of our notes payable at March 31, 2012 and December 31, 2011:

	March 31, 2012				December 31, 2011
(in millions)	Carrying Value		Estimated Fair  Value		Carrying Value		Estimated Fair  Value
Fixed rate notes payable	$	2,185.9	$	2,309.1	$	2,186.6	$	2,304.4
Floating rate notes payable	245.2		233.1		245.5		233.6