Additional Balance Sheet Information (Tables)

3 Months Ended

Mar. 31, 2012

Summary of Significant Accounting Policies / Additional Balance Sheet Information [Abstract]

Inventories

	March 31, 2012		December 31, 2011
Crude stockpile inventories	$	58.4	$	54.6
In-process and finished goods inventories		67.3		66.0
Other raw material, container, and supplies inventories		24.9		26.0
	$	150.6	$	146.6

Reclamation liability

	Three Months Ended March 31,
	2012			2011
Balance at beginning of period	$	9.3		$	7.5
Settlement of obligations		(1.3	)		(0.5	)
Liabilities incurred and accretion expense		1.8			1.0
Foreign currency		0.1			-
Balance at end of period	$	9.9		$	8.0