CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Current Assets
Cash and cash equivalents	$ 163.3	$ 152.0
Accounts receivable, net	15.5	29.6
Inventories	83.5	64.8
Deferred costs associated with deferred revenue	136.0	151.9
Other current assets	7.8	7.8
Total current assets	406.1	406.1
Property, Plant and Equipment, Net	5.0	4.9
Deposits for surety bonds	5.7	5.7
Intangible assets	60.7	62.8
Other long-term assets	6.2	6.8
Total Assets	483.7	486.3
Current Liabilities
Accounts payable and accrued liabilities	47.1	50.6
Payables under SWU purchase agreements	16.9	21.3
Inventories owed to customers and suppliers	13.3	4.9
Deferred revenue	255.5	283.2
Current debt	6.1	6.1
Total current liabilities	338.9	366.1
Long-term debt	104.9	108.0
Postretirement health and life benefit obligations	128.9	130.8
Pension benefit liabilities	119.0	124.4
Advances from customer, noncurrent	44.4	45.2
Other long-term liabilities	32.4	32.4
Total liabilities	768.5	806.9
Commitments and contingencies (Note 11)
Stockholders' Deficit
Excess of capital over par value	123.3	85.0
Accumulated deficit	(410.2)	(407.7)
Accumulated other comprehensive income (loss), net of tax	0.7	0.8
Total stockholders' deficit	(284.8)	(320.6)
Total Liabilities and Stockholders’ Equity (Deficit)	483.7	486.3
Preferred Series B [Member]
Stockholders' Deficit
Preferred stock	0.1	0.1
Common Class A [Member]
Stockholders' Deficit
Common stock	1.2	1.1
Common Class B [Member]
Stockholders' Deficit
Common stock	$ 0.1	$ 0.1