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Asset Retirement Obligations (Tables) | 12 Months Ended
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Dec. 31, 2014
Asset Retirement Obligations [Abstract] |
Summary Of Changes In Asset Retirement Obligations |
|  | Year Ended December 31,
|  | 2014 |  | 2013
|  | (In millions)
Asset retirement obligations as of beginning of period |  | $ | 2,228 |  | $ | 2,095
Liabilities incurred |  |  | 97 |  |  | 112
Liabilities settled |  |  | (56) |  |  | (83)
Revision of estimated obligation |  |  | 70 |  |  | 104
Liabilities assumed by others |  |  | (953) |  |  | (28)
Accretion expense on discounted obligation |  |  | 89 |  |  | 115
Foreign currency translation adjustment |  |  | (76) |  |  | (87)
Asset retirement obligations as of end of period |  |  | 1,399 |  |  | 2,228
Less current portion |  |  | 60 |  |  | 88
Asset retirement obligations, long-term |  | $ | 1,339 |  | $ | 2,140

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- Definition Tabular disclosure of the carrying amount of a liability for asset retirement obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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