XML 56 R40.htm IDEA: XBRL DOCUMENT v2.4.0.8
Charges and Credits - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2013
Mar. 31, 2013
Venezuela Bolivar Official Currency Exchange Rate to Dollar [Member]
Dec. 31, 2012
Venezuela Bolivar Official Currency Exchange Rate to Dollar [Member]
Mar. 31, 2013
Other Restructuring [Member]
Jun. 30, 2013
Drilling Related Technology [Member]
Jun. 30, 2013
Contract Drilling [Member]
Restructuring Cost and Reserve [Line Items]            
Pre tax and after tax gain from deconsolidation of business $ 1,028          
Impairment charge, Pretax         222 142
Impairment charge, Net         203 142
Exchange rate   6.3 4.3      
Currency loss before tax       92    
Currency loss after tax       $ 92