Inventories (Tables)

6 Months Ended

Jun. 30, 2013

Inventory, Net [Abstract]

Schedule of Inventories

	June 30, 2013						December 31, 2012
	Current Assets		Current Liabilities (a)		Inventories, Net		Current Assets		Current Liabilities (a)		Inventories, Net
Separative work units	$	660.0	$	163.8	$	496.2	$	880.9	$	382.7	$	498.2
Uranium	295.7		186.8		108.9		703.7		567.3		136.4
Materials and supplies	4.2		—		4.2		8.6		—		8.6
	$	959.9	$	350.6	$	609.3	$	1,593.2	$	950.0	$	643.2