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Sale Leaseback (Notes)	12 Months Ended
Sale Leaseback (Notes)	Dec. 31, 2016
Sale Leaseback [Abstract]
Sale Leaseback Transaction Disclosure [Text Block]	SALE-LEASEBACK During 2014, we sold jackup rigs ENSCO 83, ENSCO 89, ENSCO 93 and ENSCO 98, all of which were contracted to Pemex. We received proceeds of $211.8 million and incurred commissions and other incremental, direct costs of $5.3 million. The carrying value of these rigs was $169.6 million. In connection with this sale, we executed charter agreements with the purchaser to continue operating the rigs for the remainder of the Pemex contracts. We accounted for the transaction as a sale-leaseback, whereby we retained a significant portion of the remaining use of the rigs as a result of the charter agreements. We recorded an aggregate gain on sale of $7.5 million at the time of disposal, which represented the portion of the gain that exceeded the present value of payments due under the charter agreements, included in contract drilling expense in our consolidated statement of operations for the year ended December 31, 2014. The remaining $29.4 million gain was deferred and amortized to contract drilling expense within the Jackup segment over the remaining charter term of each rig. Of the $29.4 million deferred gain, $22.4 million and $7.0 million were recognized in contract drilling expense in our consolidated statements of operations for the years ended December 31, 2015 and December 31, 2014, respectively. Due to our long-term charter agreements with the purchaser, ENSCO 83, ENSCO 89 and ENSCO 98 operating results for periods beginning after the date of sale (September 30, 2014) were included in income from continuing operations within the Other segment. Operating results for these rigs prior to September 30, 2014 were included in income from continuing operations within the Jackup segment. The ENSCO 93 contract with Pemex ended in July 2015, less than one year from the date of sale. Therefore, our rig management operations following the sale did not constitute significant ongoing involvement. As a result, ENSCO 93 operating results were included in income (loss) from discontinued operations, net, in our consolidated statements of operations for the two-year period ended December 31, 2015. Additionally, the loss on sale of $1.2 million was included in loss from discontinued operations, net, in our consolidated statements of operations for the year ended December 31, 2014. The proceeds from the sale were included in investing activities of discontinued operations in our consolidated statement of cash flows for the year ended December 31, 2014. See "Note 10 - Discontinued Operations" for additional information.