v2.4.0.6
Supplemental Information To Statements Of Cash Flows (Schedule Of Supplemental To Cash Flow Information) (Details) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Net change in working capital:    
Decrease (increase) in accounts receivable $ 384 $ (100)
Increase in other current assets (191) (41)
Increase in accounts payable 13 9
(Decrease) increase in revenues and royalties payable (139) 130
Decrease in other current liabilities (45) (87)
Net decrease (increase) in working capital 22 (89)
Supplementary cash flow data - total operations:    
Interest paid (net of capitalized interest) 169 160
Income taxes paid (received) $ 88 $ (125)