Reportable Segments (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) item	Mar. 31, 2019 USD ($)
Severance Costs	$ 77
Accelerated depreciation	356	$ 306
Loss on assets	60
Segment Reconciling Items [Member]
Severance, accelerated depreciation, losses on disposal of assets and other charges and credits	225
Severance Costs	77
Accelerated depreciation	59
Loss on assets	60
Other charges and credits	$ 29
Minimum [Member]
Number of Material Formulations | item	150