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DISCONTINUED OPERATIONS - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 1 Months Ended
Sep. 30, 2010
Charter Fleet Business
Jul. 30, 2010
The Babcock and Wilcox Company
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Write-down on carrying value of assets disposal of discontinued operations $ 27.7  
Outstanding common stock received In connection with the spin-off of B&W, Percentage   100.00%
Outstanding common stock received In connection with the spin-off of B&W, shares   116
B&W common stock received for every shares of common stock   In connection with the spin-off, our stockholders received 100% (approximately 116 million shares) of the outstanding common stock of B&W. The distribution of B&W common stock occurred by way of a pro rata stock dividend to our stockholders. Each stockholder generally received one share of B&W common stock for every two shares of our common stock held by such stockholder on July 9, 2010, and cash in lieu of any fractional shares. Prior to the completion of the spin-off, B&W made a cash distribution to us totaling $100 million.
Cash distribution to MII to maintain appropriate working capital and liquidity levels   $ 100