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Subsequent Events - Additional Information (Detail)
$ / shares in Units, $ in Millions
1 Months Ended
Jul. 31, 2017
USD ($)
Vessel
Warrant
$ / shares
shares
Jul. 31, 2017
USD ($)
Vessel
$ / shares
shares
Jun. 30, 2017
$ / shares
Mar. 31, 2017
$ / shares
Subsequent Event [Line Items]        
Common stock, par value | $ / shares     $ 0.10 $ 0.10
Prepackaged Plan | Troms Offshore borrowings | Senior Notes        
Subsequent Event [Line Items]        
Prepackaged plan effective date Jul. 31, 2017      
Modification description of debt instrument (i) reduce by 50% the required principal payments due from the effective date to March 31, 2019, (ii) modestly increase the interest rates on amounts outstanding through the April 2023, and (iii) provide for additional security, including mortgages on six vessels and related share pledges.      
Percentage of required principal payments due from effective date 50.00%      
Number of vessels mortgaged | Vessel 6 6    
Subsequent Event        
Subsequent Event [Line Items]        
Claims paid in cash $ 225 $ 225    
Percentage of pro forma common equity 95.00% 95.00%    
Subsequent Event | Maximum | Non-U.S. Citizens        
Subsequent Event [Line Items]        
Prepackaged ownership percentage of outstanding common stock 22.00% 22.00%    
Ownership percentage of common stock 25.00% 25.00%    
Subsequent Event | Minimum | Non-U.S. Citizens        
Subsequent Event [Line Items]        
Ownership percentage of common stock 24.00% 24.00%    
Subsequent Event | Prepackaged Plan        
Subsequent Event [Line Items]        
Fresh start adjustment, description In order to adopt Fresh Start accounting, the company had to meet the following conditions: (i) holders of existing shares of the Predecessor immediately before the Plan Effective Date received less than 50 percent of the voting shares of the Successor entity and (ii) the reorganization value of the Successor was less that its postpetition liabilities and estimated allowed claims immediately before the Plan Effective Date. These conditions were met.      
Predecessor shareholders percentage of voting shares of successor entity 50.00% 50.00%    
Estimated enterprise value of successor entity $ 1,050 $ 1,050    
Estimated enterprise value for deriving equity value 943 943    
Subsequent Event | Prepackaged Plan | Maximum        
Subsequent Event [Line Items]        
Estimated enterprise value of successor entity 1,250 1,250    
Estimated enterprise value for deriving equity value 1,143 1,143    
Subsequent Event | Prepackaged Plan | Minimum        
Subsequent Event [Line Items]        
Estimated enterprise value of successor entity 850 850    
Estimated enterprise value for deriving equity value $ 743 $ 743    
Subsequent Event | New Secured Notes        
Subsequent Event [Line Items]        
Debt instrument fixed interest rate 8.00% 8.00%    
Aggregate principal amount $ 350 $ 350    
Debt instrument maturity date   Dec. 30, 2022    
Subsequent Event | New Secured Notes | Prepackaged Plan        
Subsequent Event [Line Items]        
Debt instrument fixed interest rate 8.00% 8.00%    
Debt instrument maturity year 2022 2022    
Aggregate principal amount $ 350 $ 350    
Debt instrument maturity date Aug. 01, 2022      
Debt instrument interest term Interest on the New Secured Notes will accrue at a rate of 8.00% per annum payable quarterly in arrears on February 1, May 1, August 1, and November 1 of each year in cash, beginning November 1, 2017.      
Debt instrument frequency of periodic payment of interest quarterly      
Debt Instrument default description The Indenture contains certain customary events of default, including, among other things: (1) default in the payment of any interest when it becomes due and payable; (2) default in the payment of principal at maturity; (3) default in the performance or breach of any other covenant in the Indenture,      
Debt Instrument notice of default description which default continues uncured for a period of 30 days after (i) the Company’s receipt of written notice from the Trustee or (ii) the receipt by the Company and the Trustee of written notice from the holders of not less than 25% in principal amount of the New Secured Notes as provided in the Indenture; and (4) certain voluntary or involuntary events of bankruptcy, insolvency or reorganization of the Company.      
Debt instrument collateral description the New Secured Notes and the guarantees by the Guarantors will be secured by the Collateral (as defined in the Indenture) pursuant to the terms of the Indenture and the related security documents. The Trustee’s liens upon the Collateral and the right of the holders of the New Secured Notes to the benefits and proceeds of the Trustee’s liens on the Collateral will terminate and be discharged: (i) upon satisfaction and discharge of the Indenture in accordance with the terms thereof; (ii) upon payment in full and discharge of all of the New Secured Notes outstanding under the Indenture and all other obligations under the Indenture that are outstanding, due and payable under the Indenture at the time the New Secured Notes are paid in full and discharged (other than contingent indemnity obligations for which no claim has been made); (iii) as to any Collateral of the company or the Guarantors that is sold, transferred or otherwise disposed of by the company or the Guarantors in a transaction or other circumstance that complies with the terms of the Indenture, at the time of such sale, transfer or other disposition; (iv) in whole or in part, with the consent of the holders of the New Secured Notes of the requisite aggregate principal amount of New Secured Notes in accordance with the Indenture; or (v) with respect to the assets of the Guarantors, at the time that the Guarantors are released from their guarantees in accordance with the terms of the Indenture.      
Subsequent Event | New Secured Notes | Prepackaged Plan | Maximum        
Subsequent Event [Line Items]        
Percentage of principal amount of notes as provided in indenture 25.00%      
Subsequent Event | Creditor Warrant Agreement | Prepackaged Plan | New Creditor Warrant        
Subsequent Event [Line Items]        
Warrants term 25 years      
Nominal exercise price of warrants | $ / shares $ 0.001 $ 0.001    
Warrants exercisable description one-for-one      
Subsequent Event | Creditor Warrant Agreement | Prepackaged Plan | New Creditor Warrant | Non-U.S. Citizens        
Subsequent Event [Line Items]        
Warrant exercisable for common stock | shares 1 1    
Common stock, par value | $ / shares $ 0.001 $ 0.001    
Warrants issued | shares 7,684,453 7,684,453    
Subsequent Event | Creditor Warrant Agreement | Prepackaged Plan | Maximum | New Creditor Warrant        
Subsequent Event [Line Items]        
Ownership percentage of common stock 24.00% 24.00%    
Subsequent Event | Creditor Warrant Agreement | Prepackaged Plan | Maximum | New Creditor Warrant | Non-U.S. Citizens        
Subsequent Event [Line Items]        
Prepackaged ownership percentage of outstanding common stock 22.00% 22.00%    
Subsequent Event | Equity Warrant Agreement | Prepackaged Plan        
Subsequent Event [Line Items]        
Warrant exercisable for common stock | shares 1 1    
Number of series of warrants issued | Warrant 2      
Term of each series of warrants issued 6 years      
Subsequent Event | Equity Warrant Agreement | Prepackaged Plan | Series A Warrants        
Subsequent Event [Line Items]        
Nominal exercise price of warrants | $ / shares $ 57.06 $ 57.06    
Warrants issued to purchase number of new common stock | shares 2,432,432 2,432,432    
Subsequent Event | Equity Warrant Agreement | Prepackaged Plan | Series B Warrants        
Subsequent Event [Line Items]        
Nominal exercise price of warrants | $ / shares $ 62.28 $ 62.28    
Warrants issued to purchase number of new common stock | shares 2,629,657 2,629,657    
Subsequent Event | Equity Warrant Agreement | Prepackaged Plan | Minimum        
Subsequent Event [Line Items]        
Ownership percentage of common stock 24.00% 24.00%