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 ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 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 | 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		$ 200		$ 200
Other Post Employment Benefits Plan
Defined Benefit and Contribution Disclosures [Line Items]
Expected Amortization of Gain (Loss), Next Fiscal Year		1		1
Expected Future Employer Contributions, Next Fiscal Year		250		250
Predecessor [Member] | Remaining Plans with no Plan Assets [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Employer contributions					$ 57	$ 184	$ 144
Predecessor [Member] | U.S. Retirement Savings Plan [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Defined Contribution Plan, Employer Contribution					129	187	219
Predecessor [Member] | DuPont Other Contribution Plans [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Defined Contribution Plan, Employer Contribution					33	33	57
Predecessor [Member] | Pension Plan
Defined Benefit and Contribution Disclosures [Line Items]
Remeasurement Impact Benefit Obligation						527
Curtailment loss (gain)			$ (25)		0	40	$ (6)
Employer contributions					$ 3,024	$ 535
Discount Rate			3.80%		3.42%	3.80%
Expected long-term rate of return on plan assets					7.66%	7.74%	8.10%
Predecessor [Member] | Pension Plan | Principal U.S. Pension Plan [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Curtailment loss (gain)						$ 63
Employer contributions					$ 2,900	$ 230
Lump-Sum Payments			$ 550
Expected long-term rate of return on plan assets					8.00%	8.00%	8.50%
Predecessor [Member] | Pension Plan | Other Pension Plan [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Employer contributions					$ 67	$ 121	$ 164
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)	(274)
Pre-tax cash requirements to cover actual net claims costs and related administrative expenses					166	218	237
Employer contributions					$ 166	$ 218
Discount Rate			4.03%		3.62%	4.03%
Successor [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Trust Asset		$ 558		558
Successor [Member] | Other Pension Plan [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Employer contributions				34
Successor [Member] | Remaining Plans with no Plan Assets [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Employer contributions				34
Successor [Member] | U.S. Retirement Savings Plan [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Defined Contribution Plan, Employer Contribution				53
Successor [Member] | DuPont Other Contribution Plans [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Defined Contribution Plan, Employer Contribution				17
Successor [Member] | Pension Plan
Defined Benefit and Contribution Disclosures [Line Items]
Curtailment loss (gain)				0
Employer contributions				68
Remeasurement Impact Underfunded Status				$ 560
Discount Rate		3.37%		3.37%
Expected long-term rate of return on plan assets				6.24%
Successor [Member] | Pension Plan | Principal U.S. Pension Plan [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Lump-Sum Payments		$ 140
Expected long-term rate of return on plan assets				6.25%
Successor [Member] | Other Post Employment Benefits Plan
Defined Benefit and Contribution Disclosures [Line Items]
Remeasurement Impact Benefit Obligation				$ 41
Curtailment loss (gain)				0
Pre-tax cash requirements to cover actual net claims costs and related administrative expenses				59
Employer contributions				$ 59
Discount Rate		3.56%		3.56%
Nonqualified Plan [Member] | Successor [Member] | Trust Agreement [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Contributions to Trust	$ 571
Trust Asset Distribution		$ 13
Trust Asset		$ 558		$ 558
Discontinued Operations [Member] | Predecessor [Member] | DuPont Other Contribution Plans [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Defined Contribution Plan, Employer Contribution					$ 5	$ 6	$ 39
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] | Other Post Employment Benefits Plan
Defined Benefit and Contribution Disclosures [Line Items]
Curtailment loss (gain)						$ (35)