Significant Accounting Policies Level 4 (Details) - USD ($) $ in Millions	6 Months Ended		9 Months Ended	12 Months Ended
	Dec. 31, 2019	Jun. 30, 2019	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Jul. 02, 2019	Jul. 01, 2019	Jan. 01, 2019
Foreign Currency Transaction Gain (Loss), before Tax	$ (5)	$ (8)		$ (30)	$ (4)
Interest-bearing time deposits and other cash equivalents	74			31
Restricted Cash and Cash Equivalents, Current	4			15
Debt issuance costs-Write-off				(29)
Unamortized debt issuance costs - assets				4
Depreciation	82	49		103	103
accelerated depreciation				4	14
Goodwill	178	108		109	113	$ 178	$ 0
Asset Impairment Charges	0	0		28	13
Goodwill, Impairment Loss			$ 13	1
Contract with Customer, Asset, Sale	9			11
Capitalized Turnaround Costs Noncurrent	2
Research and Development Expense	25	25		53	58
Business realignment costs	24	15		29	52
Unrealized gains (losses) on pension and OPEB plan liabilities	5	$ 0		(13)	(4)
Pension liability fair value adjustment							(44)
Concentration Risk, Percentage		14.00%
increase (decrease) in cost of sales		$ (45)		(99)	(109)
Increase (Decrease) in Selling, General and Administrative expense		(7)		(18)	(20)
Depreciation, Amortization and Accretion, Net		52		117	129
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization	1,349	1,462		3,127	2,979
Selling, general and administrative expense	139	145		277	301
Operating Lease, Right-of-Use Asset	122			0				$ 105
EPCD [Member]
Goodwill	37	41		41	42	37	0
FPD [Member]
Goodwill	$ 141	$ 67		68	71	$ 141	0
Minimum [Member]
Property, Plant and Equipment, Useful Life		1 year
Finite-Lived Intangible Asset, Useful Life		15 years
Minimum [Member] | Building [Member]
Property, Plant and Equipment, Useful Life		9 years
Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment, Useful Life		1 year
Maximum [Member]
Property, Plant and Equipment, Useful Life		5 years
Finite-Lived Intangible Asset, Useful Life		25 years
Maximum [Member] | Building [Member]
Property, Plant and Equipment, Useful Life		39 years
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment, Useful Life		20 years
Previously Reported [Member]
Previously reported, Cost of Sales		$ 1,507		3,226	3,088
Previously reported, selling general and administrative expense		$ 152		$ 295	$ 321
Fresh Start Adjustments [Member]
Pension liability fair value adjustment							$ (44)