Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2019 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2014 |
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| Goodwill and Intangible Assets Disclosure [Abstract] | |||||
| Goodwill and intangible asset impairment | $ 271 | $ 271 | $ 0 | $ 0 | $ 0 |
| Goodwill impairment | 259 | $ 259 | |||
| Intangible asset impairment | $ 12 | ||||
| X | ||||||||||
- Definition Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill. No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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