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Other Long-Term Assets, Net - Intangible Assets (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016
Finite-Lived Intangible Assets |  |
Cost | $ 1,265 | $ 603
Accumulated Amortization | (421) | (361)
Net | 844 | 242
Estimated amortization expense related to finite-lived intangible assets for the next five years |  |
2018 | 63 |
2019 | 68 |
2020 | 74 |
2021 | 75 |
2022 | 76 |
Customer contracts and relationships |  |
Finite-Lived Intangible Assets |  |
Cost | 1,188 | 529
Accumulated Amortization | (383) | (330)
Net | $ 805 | 199
Customer contracts and relationships | Minimum |  |
Finite-Lived Intangible Assets |  |
Estimated Useful Lives | 1 year |
Customer contracts and relationships | Maximum |  |
Finite-Lived Intangible Assets |  |
Estimated Useful Lives | 20 years |
Property tax abatement |  |
Finite-Lived Intangible Assets |  |
Cost | $ 38 | 38
Accumulated Amortization | (30) | (26)
Net | $ 8 | 12
Property tax abatement | Minimum |  |
Finite-Lived Intangible Assets |  |
Estimated Useful Lives | 7 years |
Property tax abatement | Maximum |  |
Finite-Lived Intangible Assets |  |
Estimated Useful Lives | 13 years |
Other agreements |  |
Finite-Lived Intangible Assets |  |
Cost | $ 39 | 36
Accumulated Amortization | (8) | (5)
Net | $ 31 | $ 31
Other agreements | Minimum |  |
Finite-Lived Intangible Assets |  |
Estimated Useful Lives | 25 years |
Other agreements | Maximum |  |
Finite-Lived Intangible Assets |  |
Estimated Useful Lives | 70 years |

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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + 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)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + 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)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + 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)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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