Restructuring and Related Activities (Asset Related Charges) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Restructuring and Related Activities [Abstract]
Asset Impairment Charges	$ 46		$ 58
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges	46		58
Non-manufacturing Assets [Member]
Restructuring and Related Activities [Abstract]
Asset Impairment Charges	24
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges	24
Non-manufacturing Assets [Member] | Fair Value, Nonrecurring [Member]
Restructuring and Related Activities [Abstract]
Asset Impairment Charges	15
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges	15
Manufacturing Facility [Member]
Restructuring and Related Activities [Abstract]
Asset Impairment Charges	7	$ 16	19	$ 34
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges	$ 7	16	19	$ 34
Manufacturing Facility [Member] | Fair Value, Nonrecurring [Member]
Restructuring and Related Activities [Abstract]
Asset Impairment Charges		75
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges		75
Packaging & Specialty Plastics [Member] | Manufacturing Facility [Member] | Fair Value, Nonrecurring [Member]
Restructuring and Related Activities [Abstract]
Asset Impairment Charges		24	19
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges		24	19
Corporate Segment [Member]
Restructuring and Related Activities [Abstract]
Asset Impairment Charges			24
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges			$ 24
Corporate Segment [Member] | Manufacturing Facility [Member] | Fair Value, Nonrecurring [Member]
Restructuring and Related Activities [Abstract]
Asset Impairment Charges		51
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges		$ 51