Recent Accounting Guidance Pension ASU (Details) - USD ($) $ in Millions	1 Months Ended	2 Months Ended	3 Months Ended	8 Months Ended	9 Months Ended
	Sep. 30, 2017	Aug. 31, 2017	Sep. 30, 2018	Aug. 31, 2017	Sep. 30, 2018
As Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of Goods Sold	$ 1,511	$ 1,975		$ 10,205
Research and Development Expense	116	278		1,064
Selling, General and Administrative Expenses	267	798		3,306
Sundry income (expense) - net	88	(112)		166
Successor [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of Goods Sold	1,531		$ 3,686		$ 14,202
Research and Development Expense	120		367		1,145
Selling, General and Administrative Expenses	276		823		2,964
Sundry income (expense) - net	121		$ 52		$ 293
Predecessor [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of Goods Sold		1,937		10,052
Research and Development Expense		267		1,022
Selling, General and Administrative Expenses		776		3,222
Sundry income (expense) - net		(183)		(113)
Effect of Adoption of ASU 2017-07 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of Goods Sold	20	(38)		(153)
Research and Development Expense	4	(11)		(42)
Selling, General and Administrative Expenses	9	(22)		(84)
Sundry income (expense) - net	$ 33	$ (71)		$ (279)