Warranties (Tables)

6 Months Ended

Jun. 30, 2012

Warranties / Contingencies [Abstract]

Changes in the accruals for warranties

	Three Months Ended June  30,						Six Months Ended June  30,
	2012			2011			2012			2011
	(in millions)
Beginning balance	$	14.5		$	12.7		$	13.5		$	13.2
Warranty costs incurred		(1.5	)		(1.4	)		(3.9	)		(2.7	)
Warranty originations and revisions		1.4			0.9			5.2			2.5
Warranty expirations		(0.6	)		(0.2	)		(1.0	)		(1.0	)
Ending balance	$	13.8		$	12.0		$	13.8		$	12.0