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Goodwill and Intangible Assets, Net Definite-lived and Indefinite-lived Intangible Assets Table (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Definite-lived intangible assets: |  |
Gross Carrying Amount | $ 712 | $ 731
Accumulated Amortization | (273) | (249)
Net Carrying Value | 439 | 482
Indefinite-lived intangible assets | 62 | 62
Intangible assets, net | 501 | 544
Customer relationships |  |
Definite-lived intangible assets: |  |
Gross Carrying Amount | 396 | 397
Accumulated Amortization | (134) | (115)
Net Carrying Value | 262 | 282
Other |  |
Definite-lived intangible assets: |  |
Gross Carrying Amount | 316 | 334
Accumulated Amortization | (139) | (134)
Net Carrying Value | $ 177 | $ 200

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