Pension Plans and Other Post Employment Benefit Plans Components of net periodic benefit cost (credit) and amounts recognized in other comprehensive loss (Details) - USD ($) $ in Millions	3 Months Ended	4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2017	Aug. 31, 2017	Dec. 31, 2018	Dec. 31, 2016
Successor [Member] | Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost		$ 49		$ 131
Interest Cost		247		752
Expected return on plan assets		(407)		(1,202)
Amortization of unrecognized loss		0		7
Amortization of prior service benefit		0		0
Curtailment loss (gain)		0		(11)
Settlement loss		0		1
Net periodic benefit cost (credit)		(111)		(322)
Net (gain) loss		(165)		906
Amortization of unrecognized loss		0		(7)
Prior service cost (benefit)		0		17
Amortization of prior service benefit		0		0
Curtailment (loss) gain		0		0
Settlement gain (loss)		0		2
Effect of foreign exchange rates		0		1
Total (benefit) loss recognized in other comprehensive loss, attributable to DuPont		(165)		919
Total recognized in net periodic benefit cost and other comprehensive (income) loss		(276)		597
Successor [Member] | Other Post Employment Benefits Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost		3		9
Interest Cost		26		85
Expected return on plan assets		0		0
Amortization of unrecognized loss		0		0
Amortization of prior service benefit		0		0
Curtailment loss (gain)		0		0
Settlement loss		0		0
Net periodic benefit cost (credit)		29		94
Net (gain) loss		68		(172)
Amortization of unrecognized loss		0		0
Prior service cost (benefit)		0		0
Amortization of prior service benefit		0		0
Curtailment (loss) gain		0		0
Settlement gain (loss)		0		0
Effect of foreign exchange rates		0		0
Total (benefit) loss recognized in other comprehensive loss, attributable to DuPont		68		(172)
Total recognized in net periodic benefit cost and other comprehensive (income) loss		97		(78)
Predecessor [Member] | Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost			$ 92		$ 174
Interest Cost			524		800
Expected return on plan assets			(824)		(1,320)
Amortization of unrecognized loss			506		822
Amortization of prior service benefit			(3)		(6)
Curtailment loss (gain)	$ (25)		0		40
Settlement loss			0		62
Net periodic benefit cost (credit)			295		572
Net (gain) loss			(22)		570
Amortization of unrecognized loss			(506)		(822)
Prior service cost (benefit)			0		0
Amortization of prior service benefit			3		6
Curtailment (loss) gain			0		(40)
Settlement gain (loss)			0		(62)
Effect of foreign exchange rates			133		(138)
Total (benefit) loss recognized in other comprehensive loss, attributable to DuPont			(392)		(486)
Total recognized in net periodic benefit cost and other comprehensive (income) loss			(97)		86
Predecessor [Member] | Other Post Employment Benefits Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost			6		11
Interest Cost			60		87
Expected return on plan assets			0		0
Amortization of unrecognized loss			61		78
Amortization of prior service benefit			(46)		(134)
Curtailment loss (gain)	$ (357)		0		(392)
Settlement loss			0		0
Net periodic benefit cost (credit)			81		(350)
Net (gain) loss			0		153
Amortization of unrecognized loss			(61)		(78)
Prior service cost (benefit)			0		(28)
Amortization of prior service benefit			46		134
Curtailment (loss) gain			0		392
Settlement gain (loss)			0		0
Effect of foreign exchange rates			0		0
Total (benefit) loss recognized in other comprehensive loss, attributable to DuPont			(15)		573
Total recognized in net periodic benefit cost and other comprehensive (income) loss			66		223
Discontinued Operations [Member] | Successor [Member] | Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit cost (credit)		1		0
Discontinued Operations [Member] | Successor [Member] | Other Post Employment Benefits Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit cost (credit)		0		0
Discontinued Operations [Member] | Predecessor [Member] | Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit cost (credit)			3		0
Discontinued Operations [Member] | Predecessor [Member] | Other Post Employment Benefits Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit cost (credit)			0		0
Continuing Operations [Member] | Successor [Member] | Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit cost (credit)		(112)		(322)
Continuing Operations [Member] | Successor [Member] | Other Post Employment Benefits Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit cost (credit)		$ 29		$ 94
Continuing Operations [Member] | Predecessor [Member] | Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit cost (credit)			292		572
Continuing Operations [Member] | Predecessor [Member] | Other Post Employment Benefits Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit cost (credit)			$ 81		$ (350)