Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2012

Commitments and Contingencies Disclosure [Abstract]

Summary of reserves associated with indemnity obligations

The table below provides a summary of reserves associated with the Kaiser indemnity obligations from December 31, 2011, through March 31, 2012:

	Indemnity Obligations
	Purchased tax credits indemnity reserve		Tax, civil and labor indemnity reserve		Total indemnity reserves
	(In millions)
Balance at December 31, 2011	$	21.5	$	9.1	$	30.6
Changes in estimates	—		—		—
Foreign exchange transaction impact	0.4		0.2		0.6
Balance at March 31, 2012	$	21.9	$	9.3	$	31.2