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Asset Impairments Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2019
Restructuring Cost and Reserve [Line Items] |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | $ 54 | $ 54
Impairment of Intangible Assets Indefinite lived Excluding Goodwill After Tax | 41 | $ 41
In Process Research and Development [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | 54 |
Impairment of Intangible Assets Indefinite lived Excluding Goodwill After Tax | $ 41 |

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- Definition Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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