v2.4.0.8
Goodwill and Other Intangible Assets (Details 2) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Change in gross carrying amounts of definite-lived intangible assets    
Gross carrying amount at the beginning of the period   $ 339
Reclassified balance associated with discontinued operations   (270)
Gross carrying amount at the end of the period 69 69
Changes in accumulated amortization and impairment of definite-lived intangible and definite-lived intangible assets    
Accumulated amortization and impairment at the beginning of the period   (285)
Amortization   (1)
Impairment associated with continuing operations   (22)
Reclassified balance associated with discontinued operations   239
Accumulated amortization and impairment at the end of the period (69) (69)
Changes in net carrying amount of definite-lived intangible and definite-lived intangible assets    
Net carrying amount at the beginning of the period   54
Amortization   (1)
Impairment associated with continuing operations   (22)
Reclassified balance associated with discontinued operations   (31)
Drilling contract intangible assets
    
Change in gross carrying amounts of definite-lived intangible assets    
Gross carrying amount at the beginning of the period   191
Reclassified balance associated with discontinued operations   (182)
Gross carrying amount at the end of the period 9 9
Changes in accumulated amortization and impairment of definite-lived intangible and definite-lived intangible assets    
Accumulated amortization and impairment at the beginning of the period   (191)
Reclassified balance associated with discontinued operations   182
Accumulated amortization and impairment at the end of the period (9) (9)
Customer relationships
    
Change in gross carrying amounts of definite-lived intangible assets    
Gross carrying amount at the beginning of the period   148
Reclassified balance associated with discontinued operations   (88)
Gross carrying amount at the end of the period 60 60
Changes in accumulated amortization and impairment of definite-lived intangible and definite-lived intangible assets    
Accumulated amortization and impairment at the beginning of the period   (94)
Amortization   (1)
Impairment associated with continuing operations   (22)
Reclassified balance associated with discontinued operations   57
Accumulated amortization and impairment at the end of the period (60) (60)
Changes in net carrying amount of definite-lived intangible and definite-lived intangible assets    
Net carrying amount at the beginning of the period   54
Amortization   (1)
Impairment associated with continuing operations   (22)
Reclassified balance associated with discontinued operations   (31)
Drilling contract intangible liabilities
    
Change in gross carrying amounts of definite-lived intangible assets    
Gross carrying amount at the beginning of the period 1,410 1,494
Reclassified balance associated with discontinued operations   (84)
Gross carrying amount at the end of the period 1,410 1,410
Changes in accumulated amortization and impairment of definite-lived intangible and definite-lived intangible assets    
Reclassified balance associated with discontinued operations   84
Changes in accumulated amortization and impairment of definite-lived intangible and definite-lived intangible liabilities    
Accumulated amortization and impairment at the beginning of the period (1,351) (1,393)
Amortization (15) (42)
Accumulated amortization and impairment at the end of the period (1,366) (1,351)
Changes in net carrying amount of definite-lived intangible and definite-lived intangible liabilities    
Net carrying amount at the beginning of the year 59 101
Amortization (15) (42)
Net carrying amount at the end of the year $ 44 $ 59