Pension Plans and Other Post Employment Benefit Plans Additional Information (Details) $ in Millions	1 Months Ended	3 Months Ended		4 Months Ended	8 Months Ended	12 Months Ended
	Nov. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2017 USD ($)	Aug. 31, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2016 USD ($)	Nov. 30, 2016
U.S. Retirement Savings Plan [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Employer Matching Contribution, Percent of Match						100.00%
Employer Matching Contribution, Percent of Employees' Gross Pay						6.00%
Employer Discretionary Contribution Percent						3.00%
Employers Discretionary Contribution, Vesting Period						3 years
Pension Plan
Defined Benefit and Contribution Disclosures [Line Items]
Discount Rate		3.37%		3.37%		3.94%
Pension Plan | Funded Pension Plans other than Principal U.S. Plan and Remaining Plans with no Plan Assets [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Expected Future Employer Contributions, Next Fiscal Year						$ 190
Other Post Employment Benefits Plan
Defined Benefit and Contribution Disclosures [Line Items]
Discount Rate		3.56%		3.56%		4.23%
Other Post Employment Benefits Plan | Funded Pension Plans other than Principal U.S. Plan and Remaining Plans with no Plan Assets [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Expected Future Employer Contributions, Next Fiscal Year						$ 240
Predecessor [Member] | Remaining Plans with no Plan Assets [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Employer contributions					$ 57		$ 184
Predecessor [Member] | U.S. Retirement Savings Plan [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Defined Contribution Plan, Employer Contribution					129		187
Predecessor [Member] | DuPont Other Contribution Plans [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Defined Contribution Plan, Employer Contribution					33		33
Predecessor [Member] | Pension Plan
Defined Benefit and Contribution Disclosures [Line Items]
Remeasurement Impact Benefit Obligation							527
Curtailment loss (gain)			$ (25)		0		$ 40
Employer contributions					$ 3,024
Discount Rate			3.80%		3.42%		3.80%
Expected long-term rate of return on plan assets					7.66%		7.74%
Predecessor [Member] | Pension Plan | Principal U.S. Pension Plan [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Employer contributions					$ 2,900		$ 230
Lump-Sum Payments			$ 550
Expected long-term rate of return on plan assets					8.00%		8.00%
Predecessor [Member] | Pension Plan | Other Pension Plan [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Employer contributions					$ 67		$ 121
Predecessor [Member] | Other Post Employment Benefits Plan
Defined Benefit and Contribution Disclosures [Line Items]
Eligible Employee Age Threshold								50
Curtailment loss (gain)			$ (357)		0		(392)
Pre-tax cash requirements to cover actual net claims costs and related administrative expenses					166		$ 218
Employer contributions					$ 166
Discount Rate			4.03%		3.62%		4.03%
Successor [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Trust Asset		$ 558		$ 558		500
Successor [Member] | Other Pension Plan [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Employer contributions				34		103
Successor [Member] | Remaining Plans with no Plan Assets [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Employer contributions				34		105
Successor [Member] | U.S. Retirement Savings Plan [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Defined Contribution Plan, Employer Contribution				53		183
Successor [Member] | DuPont Other Contribution Plans [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Defined Contribution Plan, Employer Contribution				17		51
Successor [Member] | Pension Plan
Defined Benefit and Contribution Disclosures [Line Items]
Curtailment loss (gain)				0		(11)
Employer contributions				68		$ 1,308
Remeasurement Impact Underfunded Status				$ 560
Expected long-term rate of return on plan assets				6.24%		6.19%
Successor [Member] | Pension Plan | Principal U.S. Pension Plan [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Employer contributions						$ 1,100
Lump-Sum Payments		140
Expected long-term rate of return on plan assets				6.25%		6.25%
Successor [Member] | Other Post Employment Benefits Plan
Defined Benefit and Contribution Disclosures [Line Items]
Curtailment loss (gain)				$ 0		$ 0
Pre-tax cash requirements to cover actual net claims costs and related administrative expenses				59		216
Employer contributions				59		216
Remeasurement Impact Underfunded Status				41
Nonqualified Plan [Member] | Successor [Member] | Trust Agreement [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Contributions to Trust	$ 571
Trust Asset Distribution		13				68
Trust Asset		$ 558		558		$ 500
Discontinued Operations [Member] | Predecessor [Member] | DuPont Other Contribution Plans [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Defined Contribution Plan, Employer Contribution					$ 5		$ 6
Discontinued Operations [Member] | Successor [Member] | DuPont Other Contribution Plans [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Defined Contribution Plan, Employer Contribution				$ 1
2016 Global Cost Savings and Restructuring Plan [Member] | Predecessor [Member] | Principal U.S. Pension Plan [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Curtailment loss (gain)							63
2016 Global Cost Savings and Restructuring Plan [Member] | Predecessor [Member] | Other Post Employment Benefits Plan
Defined Benefit and Contribution Disclosures [Line Items]
Curtailment loss (gain)							$ (35)