Restructuring and Asset Related Charges La Porte (Details) - Predecessor [Member] - USD ($) $ in Millions	2 Months Ended		3 Months Ended												8 Months Ended	12 Months Ended
	Aug. 31, 2017	[1]	Jun. 30, 2017	[1]	Mar. 31, 2017	[1]	Dec. 31, 2016	[1]	Sep. 30, 2016	[1]	Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Aug. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net	$ 11		$ 160		$ 152		$ 394		$ 172		$ (88)		$ 78		$ 323	$ 556	$ 795
La Porte [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net																68
Asset Related Charges [Member] | La Porte [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net																41
Employee Severance [Member] | La Porte [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net																16
Contract Termination [Member] | La Porte [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net																$ 11

[1] See Note 5 for additional information.