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Commitments and Contingencies (Policies) | 12 Months Ended
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Dec. 31, 2015
Schedule of Significant Accounting Policies [Line Items] |
Environmental Costs, Policy [Policy Text Block] | Environmental Liabilities We recognize environmental liabilities when a loss is probable and reasonably estimable. Such accruals are estimated based on currently available information, existing technology and enacted laws and regulations. Such estimates are based primarily upon the estimated cost of investigation and remediation required and the likelihood that other potentially responsible parties will be able to fulfill their commitments at the sites where we may be jointly and severally liable with such parties. We regularly evaluate and revise estimates for environmental obligations based on expenditures against established reserves and the availability of additional information.
Energy Segment [Member] |
Schedule of Significant Accounting Policies [Line Items] |
Environmental Costs, Policy [Policy Text Block] | Environmental expenditures are capitalized when such expenditures are expected to result in future economic benefits. For the years ended December 31, 2015, 2014 and 2013, capital expenditures were approximately $36 million, $101 million and $111 million, respectively, and were incurred to improve the environmental compliance and efficiency of the operations.

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- Definition Disclosure of accounting policy for obligations that resulted from improper or other-than normal operation of a long-lived asset in the past. This accounting policy may address (1) whether the related remediation costs are expensed or capitalized, (2) whether the obligation is measured on a discounted basis, (3) the event, situation, or set of circumstances that generally triggers recognition of loss contingencies arising from the entity's environmental remediation-related obligations, and (4) the timing of recognition of any recoveries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 55 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=6571209&loc=d3e13669-110860 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -URI http://asc.fasb.org/subtopic&trid=2175709 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13231-110859 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13185-110859 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=51655414&loc=d3e18780-107790 + Details
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