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