Restructuring and Asset Related Charges 2016 Global Cost Savings and Restructuring Plan (Details) - USD ($) $ in Millions		1 Months Ended		2 Months Ended		3 Months Ended														4 Months Ended	8 Months Ended	12 Months Ended
		Sep. 30, 2017		Aug. 31, 2017		Dec. 31, 2017		Jun. 30, 2017	[1]	Mar. 31, 2017		Dec. 31, 2016		Sep. 30, 2016	[1]	Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2017	Aug. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Predecessor [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net				$ 11	[1]			$ 160		$ 152	[1]	$ 394	[1]	$ 172		$ (88)		$ 78			$ 323	$ 556	$ 795
Predecessor [Member] | 2016 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net																					10	(81)	783
Restructuring Reserve, Beginning Balance		$ 47								122										$ 47	122
Payments for Restructuring																					(87)
Restructuring Reserve, Net Translation Adjustment																					2
Restructuring Reserve, Other Adjustment																					10
Restructuring Reserve, Ending Balance				47								122									47	122
Predecessor [Member] | 2016 Restructuring Program [Member] | Sundry Income (Expense) - net
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net																						3	5
Predecessor [Member] | 2016 Restructuring Program [Member] | Restructuring and Asset Related Charges - Net [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net																						(84)	778
Predecessor [Member] | Employee Severance [Member] | 2016 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net																						(150)	641
Restructuring Reserve, Beginning Balance		36								100										36	100
Payments for Restructuring																					(76)
Restructuring Reserve, Net Translation Adjustment																					2
Restructuring Reserve, Other Adjustment																					10
Restructuring Reserve, Ending Balance				36								100									36	100
Predecessor [Member] | Asset Related Charges [Member] | 2016 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net																						53	109
Predecessor [Member] | Contract Termination [Member] | 2016 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net																						16	$ 33
Restructuring Reserve, Beginning Balance	[2]	11								$ 22										11	22
Payments for Restructuring	[2]																				(11)
Restructuring Reserve, Net Translation Adjustment	[2]																				0
Restructuring Reserve, Other Adjustment	[2]																				0
Restructuring Reserve, Ending Balance	[2]			11								$ 22									11	$ 22
Successor [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net		40	[1]			$ 140	[1]													180
Successor [Member] | 2016 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net																				(5)
Restructuring Reserve, Beginning Balance		47																		47
Payments for Restructuring																				(20)
Restructuring Reserve, Other Adjustment																				(5)
Restructuring Reserve, Ending Balance				47		22														22	47
Successor [Member] | Employee Severance [Member] | 2016 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance		36																		36
Payments for Restructuring																				(18)
Restructuring Reserve, Other Adjustment																				(5)
Restructuring Reserve, Ending Balance				36		13														13	36
Successor [Member] | Contract Termination [Member] | 2016 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance	[2]	$ 11																		11
Payments for Restructuring	[2]																			(2)
Restructuring Reserve, Other Adjustment	[2]																			0
Restructuring Reserve, Ending Balance	[2]			$ 11		$ 9														$ 9	$ 11

[1] See Note 5 for additional information.

[2] Other non-personnel charges consist of contractual obligation costs.