XML 81 R66.htm IDEA: XBRL DOCUMENT v3.6.0.2
Income Taxes (Narrative) (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2016
USD ($)
jackup
Dec. 31, 2015
USD ($)
jackup
Dec. 31, 2014
USD ($)
jackup
Dec. 31, 2017
USD ($)
Income from continuing operations before income taxes in the U.S. countries $ (151.6) $ (578.2) $ (460.3)  
Income from continuing operations before income taxes in the non-U.S. countries 1,149.1 (900.0) (2,100.0)  
Deferred tax assets related to U.S. foreign tax credits 91.7 84.1    
Deferred tax assets related to net operating loss carryforwards 197.9 228.7    
Net operating loss carryforwards 802.1      
Operating loss carryforwards, Not subject to expiration 406.9      
Operating loss carryforwards, Subject to expiration 395.2      
Valuation allowance on NOL carryforwards and FTC 221.7      
Income Tax Expense (Benefit), Discrete Item 8.4   18.4  
Valuation Allowance, Deferred Tax Asset, Change in Amount 5.5 $ 11.0 $ 41.4  
Unrecognized Tax Benefits Associated with Liabilities for Unrecognized Tax Benefits $ 5.3      
Consilidated effective income tax rate excluding discrete items 20.30% 16.00% 10.70%  
Minimum percentage threshold for recognition of tax benefits 50.00%      
Total unrecognized tax benefits $ 122.0 $ 140.6 $ 134.4  
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions With Net Operating Loss Carryforwards 5.7 21.3    
Amount of unrecognized tax benefits affecting the consolidated effective income tax rate if recognized 108.6      
Amount of accrued interest and penalties included in other liabilities 26.6 30.4    
Amount of interest and penalties recognized in net tax expense 3.8 3.9 9.2  
Income tax benefits, inclusive of interest and penalties due to lapses in statute of limitations $ 0.6 $ 7.6 $ 2.4  
Number of assets transferred (in drillships or jackups) | jackup 5 1 3  
Income tax liability from gain on intercompany transfers $ 0.0      
Unamortized deferred charges related to intercompany transfers 33.0 $ 37.1    
Amount included in current income taxes for amortization of deferred income taxes related to intercompany transfers 4.1 2.6 $ 2.6  
Deferred tax liability related to temporary difference from transferred drilling rigs 18.9 21.2    
Tax benefits included in deferred income tax expense related to amortization of deferred reversing temporary differences from intercompany transfers 2.3 1.8 1.8  
Undistributed Earnings of Foreign Subsidiaries 1,000.0      
Other Liabilities [Member]        
Total unrecognized tax benefits $ 116.3 119.3    
Rig Impairments [Member]        
Income Tax Expense (Benefit), Discrete Item   $ 192.5 $ 16.4  
Minimum [Member]        
Deferred Tax Assets, Foreign, Expiration Date 2022      
Operating loss carryforwards tax credits expiration year 2017      
Maximum [Member]        
Deferred Tax Assets, Foreign, Expiration Date 2036      
Operating loss carryforwards tax credits expiration year 2026      
Other Operating Income (Expense) [Member]        
Income Tax Expense (Benefit), Discrete Item $ 16.9      
Scenario, Forecast [Member]        
Amount of unrecognized tax benefits affecting the consolidated effective income tax rate if recognized       $ 1.1
Decline in unrecognized tax benefits during next twelve months       1.1
Accrued interest and penalty assessments related to the decline in unrecognized tax benefits       $ 0.7