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Sale Leaseback (Notes)
 9 Months Ended
Sep. 30, 2015
Sale Leaseback [Abstract]  
Sale Leaseback Transaction Disclosure [Text Block]
Sale-leaseback

During the third quarter of 2014, we sold jackup rigs ENSCO 83, ENSCO 89, ENSCO 93 and ENSCO 98, all of which were contracted to Pemex. In connection with this sale, we executed charter agreements with the purchaser to continue operating the rigs for the remainder of the Pemex contracts, which had anticipated completion dates in either 2015 or 2016. We accounted for the transaction as a sale-leaseback, whereby we retain 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. 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, $5.7 million and $19.7 million were recognized in contract drilling expense in our condensed consolidated statements of operations for the three-month and nine-month periods ended September 30, 2015, and $2.7 million was included in accrued liabilities and other on our condensed consolidated balance sheet as of September 30, 2015.

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 (loss) income from discontinued operations, net in our condensed consolidated statements of operations for the three-month and nine-month periods ended September 30, 2015 and 2014. See "Note 9 - Discontinued Operations" for additional information.