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Other Long-Term Assets, Net - Schedule of Other Long-term Assets (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Finite-Lived Intangible Assets |  |
Finite-lived intangible assets, cost | $ 1,354 | $ 1,199
Finite-lived intangible assets, accumulated amortization | (549) | (492)
Finite-lived intangible assets, net | 805 | 707
Other Long-Term Assets, Net |  |
Other, cost | 165 | 152
Other, accumulated amortization | (3) | (1)
Other, net | 162 | 151
Other long-term assets, cost | 1,519 | 1,351
Other long-term assets, accumulated amortization | (552) | (493)
Other long-term assets, net | 967 | 858
Customer contracts and relationships |  |
Finite-Lived Intangible Assets |  |
Finite-lived intangible assets, cost | 1,291 | 1,134
Finite-lived intangible assets, accumulated amortization | (519) | (463)
Finite-lived intangible assets, net | $ 772 | 671
Customer contracts and relationships | Minimum |  |
Finite-Lived Intangible Assets |  |
Estimated useful lives | 3 years |
Customer contracts and relationships | Maximum |  |
Finite-Lived Intangible Assets |  |
Estimated useful lives | 29 years |
Property tax abatement |  |
Finite-Lived Intangible Assets |  |
Estimated useful lives | 13 years |
Finite-lived intangible assets, cost | $ 23 | 23
Finite-lived intangible assets, accumulated amortization | (20) | (18)
Finite-lived intangible assets, net | 3 | 5
Other agreements |  |
Finite-Lived Intangible Assets |  |
Finite-lived intangible assets, cost | 40 | 42
Finite-lived intangible assets, accumulated amortization | (10) | (11)
Finite-lived intangible assets, net | $ 30 | $ 31
Other agreements | Minimum |  |
Finite-Lived Intangible Assets |  |
Estimated useful lives | 1 year |
Other agreements | Maximum |  |
Finite-Lived Intangible Assets |  |
Estimated useful lives | 70 years |

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