Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Disclosures [Abstract]

Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments

Carrying amounts and estimated fair values of financial instruments as of the dates indicated were as follows (in millions):     

	March 31, 2013				December 31, 2012
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets:
Cash surrender value of life insurance policies	$	12.8	$	12.8	$	11.9	$	11.9
Auction rate securities	14.8		14.8		14.4		14.4
Liabilities:
Deferred compensation plan liabilities	$	3.9	$	3.9	$	3.3	$	3.3
Acquisition-related contingent consideration	142.6		142.6		143.6		143.6
4.875% senior notes	400.0		397.0		—		—
7.625% senior notes	—		—		150.0		154.9
Original 4.0% Notes	9.6		18.1		9.7		15.9
Original 4.25% Notes	3.0		5.8		3.0		5.1
New 4.0% Notes	101.6		103.4		100.9		101.5
New 4.25% Notes	92.7		94.8		92.1		92.7

Schedule Of Fair Values Of Financial Assets And Liabilities Measured On A Recurring Basis

The fair values of financial assets and liabilities measured on a recurring basis were determined using the following inputs as of the dates indicated (in millions):

			Fair Value Measurements Using Inputs Considered as Significant
	Fair Value as of March 31, 2013		Level 1		Level 2	Level 3
Assets
Cash surrender value of life insurance policies	$	12.8	$	12.8	—	—
Auction rate securities	$	14.8	—		—	$	14.8
Liabilities
Deferred compensation plan liabilities	$	3.9	$	3.9	—	—
Acquisition-related contingent consideration	$	142.6	—		—	$	142.6
			Fair Value Measurements Using Inputs Considered as Significant
	Fair Value as of December 31, 2012		Level 1		Level 2	Level 3
Assets
Cash surrender value of life insurance policies	$	11.9	$	11.9	—	—
Auction rate securities	$	14.4	—		—	$	14.4
Liabilities
Deferred compensation plan liabilities	$	3.3	$	3.3	—	—
Acquisition-related contingent consideration	$	143.6	—		—	$	143.6

Reconciliation Of Assets And Liabilities Measured At Fair Value On A Recurring Basis, Level 3

The following tables, which may contain summation differences due to rounding, provide a reconciliation between the beginning and ending balances of items measured at fair value on a recurring basis using significant unobservable inputs for the periods indicated (in millions):

	Auction Rate Securities
Assets	Student Loan			Structured Finance Securities		Total
Balance as of December 31, 2011	$	11.8		$	1.7	$	13.5
Changes in fair value recorded in earnings	—			—		—
Unrealized gains included in other comprehensive income	$	0.2		$	0.3	$	0.5
Balance as of March 31, 2012	$	12.0		$	2.0	$	14.0
Balance as of December 31, 2012	$	11.7		$	2.7	$	14.4
Changes in fair value recorded in earnings	—			—		—
Unrealized gains included in other comprehensive income	—			0.4		0.4
Balance as of March 31, 2013	$	11.7		$	3.0	$	14.8
Liabilities	Acquisition-Related Contingent Consideration
Balance as of December 31, 2011	$	79.3
Payments of contingent consideration	—
Valuation gains (losses) recorded in earnings	—
Balance as of March 31, 2012	$	79.3
Balance as of December 31, 2012	$	143.6
Payments of contingent consideration	(0.6		)
Valuation gains (losses) recorded in earnings	—
Currency translation adjustments included in other comprehensive income	(0.4		)
Balance as of March 31, 2013	$	142.6