Pension and Postretirement Expense Level 4 (Details) - Amounts Recognized - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018	Jul. 01, 2019	Dec. 31, 2017
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Other assets, net	$ 55		$ 34
Other Liabilities, Current	(105)		(106)
Liability, Defined Benefit Plan, Noncurrent	(252)		(221)
Accumulated other comprehensive income	1		18	$ 0	$ 8
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net Amounts Recognized in Accumulated Other Comprehensive Income	0		(1)	0	$ 1
Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Other assets, net	0		0	0
Other Liabilities, Current	0		0	0
Liability, Defined Benefit Plan, Noncurrent	(28)		(31)	(32)
Accumulated other comprehensive income	0		0	0
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	(28)		(31)	(32)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	0		1	0
Deferred income taxes	0		(1)	0
Net Amounts Recognized in Accumulated Other Comprehensive Income	0		0	0
Defined Benefit Plan, Accumulated Benefit Obligation	225		216	228
Accumulated Benefit Obligation for Funded Plans	225		216	228
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Accumulated Benefit Obligation	225		216	228
Pension Benefits Fair Value of Plan Assets of Underfunded Plans	197		185	196
Pension Plans with Underfunded Accumulated Benefit Obligations [Abstract]
Aggregate Projected Benefit Obligation for Underfunded Pension Plans	225		216	228
Aggregate Projected Benefit Obligation for Underfunded Pension Plans	225		216	228
Aggregate Fair Value of Plan Assets for Underfunded Pension Plans	197		185	196
Pension Plan [Member] | Non-US [Member]
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Other assets, net	8		0	8
Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Other Liabilities, Current	(5)		(5)	(6)
Liability, Defined Benefit Plan, Noncurrent	(208)		(174)	(210)
Accumulated other comprehensive income	0		0	0
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	(205)		(179)	(208)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	0		(1)	0
Deferred income taxes	0		1	0
Net Amounts Recognized in Accumulated Other Comprehensive Income	0		0	0
Defined Benefit Plan, Accumulated Benefit Obligation	648		548	634
Accumulated Benefit Obligation for Funded Plans	446		380	431
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Accumulated Benefit Obligation	216		181	217
Pension Benefits Fair Value of Plan Assets of Underfunded Plans	13		12	13
Pension Plans with Underfunded Accumulated Benefit Obligations [Abstract]
Aggregate Projected Benefit Obligation for Underfunded Pension Plans	224		187	225
Aggregate Projected Benefit Obligation for Underfunded Pension Plans	287		584	286
Aggregate Fair Value of Plan Assets for Underfunded Pension Plans	74		403	71
Other Postretirement Benefits Plan [Member] | UNITED STATES
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Other assets, net	0		0	0
Other Liabilities, Current	0		0	0
Liability, Defined Benefit Plan, Noncurrent	0		0	0
Accumulated other comprehensive income	0		(2)	0
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	0		(2)	0
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	0		0	0
Deferred income taxes	0		(2)	0
Net Amounts Recognized in Accumulated Other Comprehensive Income	0		(2)	0
Pension plans with projected benefit obligation [Abstract]
Actuarial Gain from Plan Amendment	0	$ 0	(4)
Other Postretirement Benefits Plan [Member] | Non-US [Member]
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Other assets, net	0		0	0
Other Postretirement Benefits Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Other Liabilities, Current	(1)		(1)	(1)
Liability, Defined Benefit Plan, Noncurrent	(12)		(12)	(16)
Accumulated other comprehensive income	0		0	0
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	(13)		(13)	(17)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	0		1	0
Deferred income taxes	0		(1)	0
Net Amounts Recognized in Accumulated Other Comprehensive Income	0		0	$ 0
Pension plans with projected benefit obligation [Abstract]
Actuarial Gain from Plan Amendment	$ 0	$ 0	$ 0