Restructuring and Asset Related Charges - Net (La Porte) (Narrative) (Details) - Predecessor - USD ($) $ in Millions	2 Months Ended	3 Months Ended	8 Months Ended	9 Months Ended
	Aug. 31, 2017	Sep. 30, 2016	Aug. 31, 2017	Sep. 30, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net	$ 11	$ 172	$ 323	$ 162
La Porte [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net				75
La Porte [Member] | Asset Related Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net				41
La Porte [Member] | Other Non-Personnel Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net				18
La Porte [Member] | Severance and Related Benefit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net				$ 16