Income Taxes Level 4 (Details) - Deferred Tax Assets and Liabilities - USD ($) $ in Millions	Dec. 31, 2019	Jul. 01, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Assets
Non-pension post-employment	$ 4		$ 5
Accrued and other expenses	100		56
Deferred Tax Assets, Property, Plant and Equipment	4		4
Loss, expense, and credit carryforwards	165		488
Intangible Assets, Current	0		5
Pension and postretirement benefit liabilities	47		37
Gross deferred tax assets	320		595
Valuation allowance	(140)	$ (120)	(547)	$ (522)	$ (651)
Net deferred tax asset	180		48
Liabilities [Abstract]
Property, plant and equipment	(263)		(47)
Unrepatriated earnings of foreign subsidiaries	(10)		(10)
Intangible assets	(65)		(6)
Gross deferred tax liabilities	(338)		(63)
Net deferred tax liability	$ (158)		$ (15)