v2.4.0.8
Discontinued Operations (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 6 Months Ended 1 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Dec. 31, 2013
Drilling management services
Jun. 30, 2014
Shelf Drilling Holdings, Ltd
drillingunit
Jun. 30, 2014
Shelf Drilling Holdings, Ltd
drillingunit
Dec. 31, 2013
Shelf Drilling Holdings, Ltd
Nov. 30, 2012
Shelf Drilling Holdings, Ltd
drillingunit
Jun. 30, 2013
Standard Jackups D.R. Stewart, Interocean III and GSF Adriatic VIII and related equipment
Feb. 28, 2014
ADTI
item
Jun. 30, 2014
ADTI
Jun. 30, 2014
ADTI
Jun. 30, 2013
Disposal of assets unrelated to rig sales
Jun. 30, 2013
Disposal of assets unrelated to rig sales
Summarized results of discontinued operations                                
Operating revenues $ 25 $ 262 $ 133 $ 515                        
Operating and maintenance expense (27) (269) (131) (534)                        
Gain (loss) on disposal of assets in discontinued operations, net   3 (10) 18                 (1) (12)    
Loss from discontinued operations before income tax expense (2) (4) (8) (1)                        
Income tax (expense) (5) (7) (7) (13)                        
Loss from discontinued operations, net of tax (7) (11) (15) (14)                        
Assets                                
Materials and supplies, net 2   2   18   2 2 19              
Other related assets         1                      
Assets held for sale 2   2   19                      
Other current assets         6                      
Total current assets 2   2   25                      
Liabilities                                
Deferred revenue         8                      
Other current liabilities         8                      
Summarized results of Discontinued Operations                                
Number of Drilling Units Sold                   38            
Number of Standard Jackups (in drilling units)             2 2                
Proceeds from disposal of assets, net 10 3 101 4     22 25     63          
Gain on disposal of assets, net 1 (2) (2) (9)     1 2     15       3 3
Aggregate gain (loss) on sale of assets per diluted share (in dollars per share)                     $ 0.04   $ (0.03) $ (0.03) $ 0.01 $ 0.01
Aggregate gain (loss) on disposal of assets, tax effect             0 0     0   0 0 0 0
Maximum financial support             125 125                
Letters of credit issued under committed and uncommitted credit lines             105 105 104 113            
Maximum additional financial support, excluding parent guarantees             65 65                
Proceeds from disposal of discontinued operations, net 22   36 63                   11    
Aggregate carrying amounts of assets associated with disposal group           6                    
Limited guarantee provided in favor of number of customer through expiration of the current drilling project                       1        
Working capital line of credit to the buyer                       15        
Fixed interest percentage on working capital line of credit to buyer                         8.30% 8.30%    
Borrowings outstanding under working capital line of credit to buyer                         $ 15 $ 15