Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Disclosures [Abstract]

Schedule of assets and liabilities measured at fair value on a recurring basis

The following tables present assets and liabilities measured at fair value on a recurring basis (in millions):

				Fair Value Measurements at Reporting Date Using
	March 31, 2013			Quoted prices in Active Markets for Identical Assets (Level 1)			Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
Equity securities	$	712.8		$	712.8		$			$
Investments in pooled funds	40.8						40.8
Fixed income securities	25.9						25.9
Deferred compensation liabilities	(52.6		)	(52.6		)
Interest rate swap liability	(1.6		)				(1.6		)
Total	$	725.3		$	660.2		$	65.1		$

				Fair Value Measurements at Reporting Date Using
	December 31, 2012			Quoted prices in Active Markets for Identical Assets (Level 1)			Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
Equity securities	$	651.7		$	651.7		$			$
Investments in pooled funds	47.9						47.9
Fixed income securities	18.4						18.4
Deferred compensation liabilities	(43.8		)	(43.8		)
Interest rate swap liability	(2.3		)				(2.3		)
Total	$	671.9		$	607.9		$	64.0		$