Fair Value Of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2011

Fair Value Of Financial Instruments [Abstract]

Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments


	December 31, 2011				December 31, 2010
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets
Cash surrender value of life insurance policies	$	7.9	$	7.9	$	8.3	$	8.3
Auction rate securities		13.6		13.6		19.0		19.0

Liabilities
Acquisition-related contingent consideration	$	79.2	$	79.2	$	45.0	$	45.0
7.625% senior notes		150.0		156.4		150.0		151.9
Original 4.0% Notes		9.7		12.5		115.0		139.2
Original 4.25% Notes		3.0		4.0		100.0		120.4
New 4.0% Notes		98.2		99.4		—		—
New 4.25% Notes		89.9		91.1		—		—

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


			Fair Value Measurements Using Inputs Considered as Significant
	Fair Value as of December 31, 2011		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Cash surrender value of life insurance policies	$	7.9	$	7.9	$	—	$	—
Auction rate securities		13.6		—		—		13.6

Liabilities
Acquisition-related contingent consideration	$	79.2	$	—	$	—	$	79.2

			Fair Value Measurements Using Inputs Considered as Significant
	Fair Value as of December 31, 2010		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Cash surrender value of life insurance policies	$	8.3	$	8.3	$	—	$	—
Auction rate securities		19.0		—		—		19.0

Liabilities
Acquisition-related contingent consideration	$	45.0	$	—	$	—	$	45.0

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


	Auction Rate Securities
	Student Loan			Structured Finance Securities			Total
Assets

Balance at December 31, 2009	$	16.4		$	8.1		$	24.5
Redemption or sale of securities, cost basis		—			(6.6	)		(6.6	)
Reversal of unrealized losses on redeemed or sold securities		—			0.9			0.9
Changes in fair value recorded in earnings		—			(1.2	)		(1.2	)
Changes in unrealized gains included in other comprehensive income		—			1.4			1.4

Balance at December 31, 2010	$	16.4		$	2.6		$	19.0

Redemption or sale of securities, cost basis		(4.6	)		—			(4.6	)
Reversal of unrealized losses on redeemed or sold securities		0.5			—			0.5
Changes in fair value recorded in earnings		—			(0.6	)		(0.6	)
Changes in unrealized losses included in other comprehensive income		(0.4	)		(0.3	)		(0.7	)

Balance at December 31, 2011	$	11.9		$	1.7		$	13.6


	Acquisition-Related Contingent Consideration
Liabilities

Balance at December 31, 2009	$	54.2
Changes in fair value recorded in earnings		0.5
Payments of contingent consideration		(9.7	)

Balance at December 31, 2010	$	45.0
Additions from new business combinations		46.4
Payments of contingent consideration		(12.2	)

Balance at December 31, 2011	$	79.2

- Definition

Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income, and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.

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- Definition

Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such certain disclosures about the financial instruments, assets, and liabilities include: (1) the fair value of the required items together with their carrying amounts (as appropriate) and (2) the methodology and assumptions used in developing such estimates of fair value.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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