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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2017
Goodwill and Other Intangible Assets |
Schedule of Other Intangible Assets | Our other intangible assets consisted of the following as of December 31 (in millions):
|  | Customer |  | Covenants |  | Licenses, |  |  |
|  | and Supplier |  | Not-to- |  | Permits |  |  |
|  | Relationships |  | Compete |  | and Other |  | Total
2017 |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  | $ | 880 |  | $ | 48 |  | $ | 124 |  | $ | 1,052
Less: Accumulated amortization |  |  | (422) |  |  | (21) |  |  | (62) |  |  | (505)
|  | $ | 458 |  | $ | 27 |  | $ | 62 |  | $ | 547
2016 |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  | $ | 835 |  | $ | 59 |  | $ | 123 |  | $ | 1,017
Less: Accumulated amortization |  |  | (342) |  |  | (31) |  |  | (53) |  |  | (426)
|  | $ | 493 |  | $ | 28 |  | $ | 70 |  | $ | 591

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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