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Liabilities Subject to Compromise - Schedule of Liabilities Subject to Compromise (Detail) - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017
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Fresh-Start Adjustment [Line Items] |  |
Liabilities subject to compromise | $ 9,050 | $ 9,191
Senior under secured or impaired external debt [Member] |  |
Fresh-Start Adjustment [Line Items] |  |
Liabilities subject to compromise | 5,266 | 5,371
Senior Unsecured Bonds [Member] |  |
Fresh-Start Adjustment [Line Items] |  |
Liabilities subject to compromise | 2,334 | 2,334
New build global settlement agreement [Member] |  |
Fresh-Start Adjustment [Line Items] |  |
Liabilities subject to compromise | 1,064 | 1,064
Derivative [Member] |  |
Fresh-Start Adjustment [Line Items] |  |
Liabilities subject to compromise | 249 | 249
Accounts Payable And Other Liabilities [Member] |  |
Fresh-Start Adjustment [Line Items] |  |
Liabilities subject to compromise | 84 | 103
Accrued Interest On Notes Payable [Member] |  |
Fresh-Start Adjustment [Line Items] |  |
Liabilities subject to compromise | 49 | 50
Related Party Debt [Member] |  |
Fresh-Start Adjustment [Line Items] |  |
Liabilities subject to compromise | $ 4 | $ 20

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- Definition Total amount of liabilities subject to compromise. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56145-112766 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=64805424&loc=d3e55717-112764 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6918054&loc=d3e56015-112765 + Details
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