XML 58 R45.htm IDEA: XBRL DOCUMENT v3.5.0.2
Discontinued Operations (Narrative) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Jun. 30, 2015
Dec. 31, 2016
Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Discontinued Operations, Income Tax Expense (Benefit), Discrete Item     $ 13.3    
Impairment of Long-Lived Assets to be Disposed of, Net of Tax Benefit $ 0.0 $ 7.2   $ 0.0 $ 7.2
Net proceeds from rig sale     1.2    
ENSCO 6000 [Member] | Floaters [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Impairment of Long-Lived Assets to be Disposed of     7.2    
ENSCO 5002 [Member] [Member] | Floaters [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Net proceeds from rig sale     $ 1.6