Income Taxes (Tables)

9 Months Ended

Sep. 30, 2011

Income Taxes [Abstract]

Reconciliation of the Change in Unrecognized Tax Benefits

A reconciliation of the change in our unrecognized tax benefits from December 31, 2010 to September 30, 2011 is as follows (in millions):

	Gross Unrecognized Income Tax Benefits			Accrued Interest and Penalties
Balance at December 31, 2010	$	12.6		$	1.1
Gross amount of increases in unrecognized tax benefits related to prior periods		23.5			—
Gross amount of decreases in unrecognized tax benefits related to prior periods		(0.1	)		—
Decreases in unrecognized tax benefits relating to settlements with taxing authorities		(24.8	)		—
Reductions to unrecognized tax benefits as a result of a lapse of the applicable statute of limitations		(3.2	)		(1.0	)
Balance at September 30, 2011	$	8.0		$	0.1