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Goodwill and Other Intangible Assets (Details 2) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012
Change in gross carrying amounts of definite-lived intangible assets |  |
Gross carrying amount at the beginning of the period |  | $ 339
Reclassified balance associated with discontinued operations |  | (270)
Gross carrying amount at the end of the period | 69 | 69
Changes in accumulated amortization and impairment of definite-lived intangible and definite-lived intangible assets |  |
Accumulated amortization and impairment at the beginning of the period |  | (285)
Amortization |  | (1)
Impairment associated with continuing operations |  | (22)
Reclassified balance associated with discontinued operations |  | 239
Accumulated amortization and impairment at the end of the period | (69) | (69)
Changes in net carrying amount of definite-lived intangible and definite-lived intangible assets |  |
Net carrying amount at the beginning of the period |  | 54
Amortization |  | (1)
Impairment associated with continuing operations |  | (22)
Reclassified balance associated with discontinued operations |  | (31)
Drilling contract intangible assets |  |
Change in gross carrying amounts of definite-lived intangible assets |  |
Gross carrying amount at the beginning of the period |  | 191
Reclassified balance associated with discontinued operations |  | (182)
Gross carrying amount at the end of the period | 9 | 9
Changes in accumulated amortization and impairment of definite-lived intangible and definite-lived intangible assets |  |
Accumulated amortization and impairment at the beginning of the period |  | (191)
Reclassified balance associated with discontinued operations |  | 182
Accumulated amortization and impairment at the end of the period | (9) | (9)
Customer relationships |  |
Change in gross carrying amounts of definite-lived intangible assets |  |
Gross carrying amount at the beginning of the period |  | 148
Reclassified balance associated with discontinued operations |  | (88)
Gross carrying amount at the end of the period | 60 | 60
Changes in accumulated amortization and impairment of definite-lived intangible and definite-lived intangible assets |  |
Accumulated amortization and impairment at the beginning of the period |  | (94)
Amortization |  | (1)
Impairment associated with continuing operations |  | (22)
Reclassified balance associated with discontinued operations |  | 57
Accumulated amortization and impairment at the end of the period | (60) | (60)
Changes in net carrying amount of definite-lived intangible and definite-lived intangible assets |  |
Net carrying amount at the beginning of the period |  | 54
Amortization |  | (1)
Impairment associated with continuing operations |  | (22)
Reclassified balance associated with discontinued operations |  | (31)
Drilling contract intangible liabilities |  |
Change in gross carrying amounts of definite-lived intangible assets |  |
Gross carrying amount at the beginning of the period | 1,410 | 1,494
Reclassified balance associated with discontinued operations |  | (84)
Gross carrying amount at the end of the period | 1,410 | 1,410
Changes in accumulated amortization and impairment of definite-lived intangible and definite-lived intangible assets |  |
Reclassified balance associated with discontinued operations |  | 84
Changes in accumulated amortization and impairment of definite-lived intangible and definite-lived intangible liabilities |  |
Accumulated amortization and impairment at the beginning of the period | (1,351) | (1,393)
Amortization | (15) | (42)
Accumulated amortization and impairment at the end of the period | (1,366) | (1,351)
Changes in net carrying amount of definite-lived intangible and definite-lived intangible liabilities |  |
Net carrying amount at the beginning of the year | 59 | 101
Amortization | (15) | (42)
Net carrying amount at the end of the year | $ 44 | $ 59

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- Definition Sum of the gross carrying amounts before accumulated amortization as of the balance sheet date of all intangible liabilities having statutory or estimated useful lives. The aggregate gross carrying amount belongs to a major finite-lived intangible liabilities class. A major class is composed of intangible liabilities that can be grouped together because they are similar, either by their nature or by their use in the operations of the company. + References No definition available. + Details
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- Definition Represents the amount of impairment charges pertaining to intangible assets or liabilities associated with discontinued operations reclassified during the period from accumulated impairment charges. + References No definition available. + Details
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- Definition Represents the amount, net of impairment charges, of intangible assets associated with discontinued operations reclassified during the period. + References No definition available. + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16373-109275 + Details
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