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Regulatory Matters, Commitments, Contingencies And Environmental Liabilities (Tables) | 3 Months Ended
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Mar. 31, 2018
Regulatory Matters, Commitments, Contingencies And Environmental Liabilities [Abstract] |
Schedule of Rent Expense [Table Text Block] | We have certain non-cancelable leases for property and equipment, which require fixed monthly rental payments with typical initial terms of 5 to 15 years, with some having a term of 40 years or more. The table below reflects rental expense under these operating leases included in operating expenses in the accompanying statements of operations, which include contingent rentals, and rental expense recovered through related sublease rental income:
| Three Months Ended March 31,
| 2018 |  | 2017
Rental expense (1) | $ | 40 |  |  | $ | 40 |
Less: Sublease rental income | (6 | ) |  | (6 | )
Rental expense, net | $ | 34 |  |  | $ | 34 |
(1) | Includes contingent rentals totaling $1 million and $4 million for three months ended March 31, 2018 and 2017, respectively.
Environmental Exit Costs by Cost | The table below reflects the amounts of accrued liabilities recorded in our consolidated balance sheets related to environmental matters that are considered to be probable and reasonably estimable. Currently, we are not able to estimate possible losses or a range of possible losses in excess of amounts accrued. Except for matters discussed above, we do not have any material environmental matters assessed as reasonably possible that would require disclosure in our consolidated financial statements.
| March 31, 2018 |  | December 31, 2017
Current | $ | 54 |  |  | $ | 35 |
Non-current | 326 |  |  | 337 |
Total environmental liabilities | $ | 380 |  |  | $ | 372 |

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- Definition REGULATORY MATTERS, COMMITMENTS, CONTINGENCIES, AND ENVIRONMENTAL LIABILITIES [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of material liabilities for remediation, site restoration, postclosure, monitoring commitments, or other exit costs that may occur on the sale, disposal or abandonment of a property as a result of unanticipated contamination of the assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.Y.Q4) -URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751 + Details
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- Definition Tabular disclosure of rental expense from operating leases for each period for which an income statement is presented with separate amounts for minimum rentals, contingent rentals, and sublease rentals. Rental payments under leases with terms of a month or less that were not renewed need not be included. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717 + Details
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