Income Taxes (Notes)	6 Months Ended
Income Taxes (Notes)	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	INCOME TAXES Intraperiod tax allocation rules require that all items, including other comprehensive income and discontinued operations, be considered for purposes of determining the amount of tax benefit that results from a loss in continuing operations. Because there is a full valuation allowance against deferred tax assets and there are pretax losses from continuing operations and income in other components of the financial statements (e.g., discontinued operations and other comprehensive income), the income tax benefit from pretax losses from continuing operations is limited to the amount of income tax expense recorded on all items other than continuing operations. The income tax benefit from continuing operations consists of the income tax benefit calculated using an estimated annual effective tax rate as well as discrete items. The estimated annual effective tax rate applied to pretax losses from continuing operations for the interim period is calculated using the estimated full-year plan for ordinary income and the year-to-date amounts for discontinued operations and other comprehensive income. The income tax expense on all items other than continuing operations is recorded based on year-to-date amounts. USEC and its subsidiaries file income tax returns with the U.S. government and various states and foreign jurisdictions. In the second quarter of 2014, the IRS completed USEC’s federal income tax return examination for tax years 2008 through 2011. A full valuation allowance against net deferred taxes was first recorded in 2011 due to cumulative losses incurred in recent years and due to substantial uncertainty to generate future taxable income that would lead to realization of the net deferred tax assets. The valuation allowance results in USEC’s inability to record tax benefits on future losses until USEC generates sufficient taxable income to support the elimination of the valuation allowance. However, the valuation allowance will not affect the Company’s ability to use its deferred tax assets if it generates taxable income in the future. In connection with the bankruptcy plan, USEC expects to have an ownership change under Section 382 of the Internal Revenue Code as a result of issuing new common stock. USEC also expects deferred taxes will be adjusted for reductions or limitations in future tax attributes, such as net operating losses and tax credits, as well as other impacts related to emerging from bankruptcy and fresh start accounting. As deferred taxes are adjusted, the related valuation allowance will also be adjusted.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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