v2.4.0.6
Property And Equipment (Details) (USD $)
1 Months Ended
Apr. 30, 2012
Property And Equipment [Abstract]  
Proceeds from divestiture of interest in joint venture $ 900,000,000
Interest in new ventures 33.30%
Number of joint ventures commited to in agreement 5
Funding commitment for future exploration, development and drilling costs associated with new joint ventures $ 1,600,000,000