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Drilling Fleet (Disposal) (Details) $ / shares in Units, $ in Millions |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
May 31, 2017 item | Jun. 30, 2017 USD ($) $ / shares | Jun. 30, 2016 USD ($) $ / shares | Jun. 30, 2017 USD ($) $ / shares | Jun. 30, 2016 USD ($) $ / shares | Dec. 31, 2016 USD ($)
Dispositions |  |  |  |  |  |
Net cash proceeds from sale of assets |  |  |  | $ 329 | $ 15 |
Gain (loss) on the sale of assets |  | $ (1,595) | $ (2) | (1,593) | (1) |
Assets held for sale |  |  |  |  |  |
Dispositions |  |  |  |  |  |
Assets held for sale, included in other current assets |  | 5 |  | 5 |  | $ 6
Assets held for sale | Rig sales |  |  |  |  |  |
Dispositions |  |  |  |  |  |
Aggregate loss on impairment of assets held for sale |  | $ 17 | $ 12 | $ 17 | $ 15 |
Aggregate loss on impairment of assets per diluted share | $ / shares |  | $ 0.04 | $ 0.03 | $ 0.04 | $ 0.04 |
Aggregate loss on impairment of assets held for sale, tax effect |  | $ 0 |  | $ 0 |  |
Aggregate loss on impairment of assets held for sale, net of tax |  |  |  |  | $ 14 |
Assets sold, not discontinued operations | Rig sales |  |  |  |  |  |
Dispositions |  |  |  |  |  |
Net cash proceeds from sale of assets |  |  | $ 8 | 3 | 11 |
Gain (loss) on the sale of assets |  |  | 4 | 2 | 5 |
Assets sold, not discontinued operations | Sell of Standard Jackup and swamp barge market sectors |  |  |  |  |  |
Dispositions |  |  |  |  |  |
Number of High-Specification Jackups (in drilling units) | item | 10 |  |  |  |  |
Number of High-Specification Jackup under construction (in drilling units) | item | 5 |  |  |  |  |
Number of high specification jackups operated through contract completion or novation | item | 3 |  |  |  |  |
Number of high specification jackups no longer operated | item | 1 |  |  |  |  |
Net cash proceeds from sale of assets |  | 319 |  | 319 |  |
Gain (loss) on the sale of assets |  | $ (1,600) |  | $ (1,600) |  |
Gain (loss) on the sale of assets per diluted share | $ / shares |  | $ (4.08) |  | $ (4.08) |  |
Gain (loss) on disposal of assets, tax effect |  | $ 0 |  | $ 0 |  |
Disposal group operating income |  | 9 | 8 | 27 | 22 |
Assets sold, not discontinued operations | Sale of other assets |  |  |  |  |  |
Dispositions |  |  |  |  |  |
Net cash proceeds from sale of assets |  | $ 6 | $ 3 | 7 | 4 |
Gain (loss) on the sale of assets |  |  |  | $ 1 | $ (6) |

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- Definition Number of High-Specification Jackups. High-Specification Jackups are harsh environment and high-performance jackups. Jackups are self-elevating drilling platforms that have legs that can be lowered to the ocean floor to establish a foundation to support the drilling platform. These units are generally suited for water depths of 400 feet or less. + References No definition available. + Details
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- Definition Amount classified as assets attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=65878427&loc=d3e1107-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721533-107759 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=64862545&loc=d3e2941-110230 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721673-107760 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2473-110228 + Details
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