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, 2016	Dec. 31, 2015
Successor [Member] | Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost		$ 49
Interest Cost		247
Expected return on plan assets		(407)
Amortization of unrecognized loss		0
Amortization of prior service benefit		0
Curtailment loss (gain)		0
Settlement loss		0
Net periodic benefit cost (credit)		(111)
Net (gain) loss		(165)
Amortization of unrecognized loss		0
Prior service benefit		0
Amortization of prior service benefit		0
Curtailment (loss) gain		0
Settlement loss		0
Effect of foreign exchange rates		0
Spin-off of Chemours		0
Total (benefit) loss recognized in other comprehensive loss, attributable to DuPont		(165)
Total recognized in net periodic benefit cost and other comprehensive (income) loss		(276)
Successor [Member] | Other Post Employment Benefits Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost		3
Interest Cost		26
Expected return on plan assets		0
Amortization of unrecognized loss		0
Amortization of prior service benefit		0
Curtailment loss (gain)		0
Settlement loss		0
Net periodic benefit cost (credit)		29
Net (gain) loss		68
Amortization of unrecognized loss		0
Prior service benefit		0
Amortization of prior service benefit		0
Curtailment (loss) gain		0
Settlement loss		0
Effect of foreign exchange rates		0
Spin-off of Chemours		0
Total (benefit) loss recognized in other comprehensive loss, attributable to DuPont		68
Total recognized in net periodic benefit cost and other comprehensive (income) loss		97
Predecessor [Member] | Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost			$ 92	$ 174	$ 232
Interest Cost			524	800	1,084
Expected return on plan assets			(824)	(1,320)	(1,554)
Amortization of unrecognized loss			506	822	768
Amortization of prior service benefit			(3)	(6)	(9)
Curtailment loss (gain)	$ 25		0	(40)	6
Settlement loss			0	62	76
Net periodic benefit cost (credit)			295	572	591
Net (gain) loss			(22)	570	57
Amortization of unrecognized loss			(506)	(822)	(768)
Prior service benefit			0	0	0
Amortization of prior service benefit			3	6	9
Curtailment (loss) gain			0	(40)	6
Settlement loss			0	(62)	(76)
Effect of foreign exchange rates			133	(138)	(119)
Spin-off of Chemours			0	0	(382)
Total (benefit) loss recognized in other comprehensive loss, attributable to DuPont			(392)	(486)	(1,273)
Total recognized in net periodic benefit cost and other comprehensive (income) loss			(97)	86	(682)
Predecessor [Member] | Other Post Employment Benefits Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost			6	11	15
Interest Cost			60	87	112
Expected return on plan assets			0	0	0
Amortization of unrecognized loss			61	78	78
Amortization of prior service benefit			(46)	(134)	(182)
Curtailment loss (gain)	$ 357		0	392	274
Settlement loss			0	0	0
Net periodic benefit cost (credit)			81	(350)	(251)
Net (gain) loss			0	153	(4)
Amortization of unrecognized loss			(61)	(78)	(78)
Prior service benefit			0	(28)	0
Amortization of prior service benefit			46	134	182
Curtailment (loss) gain			0	392	274
Settlement loss			0	0	0
Effect of foreign exchange rates			0	0	1
Spin-off of Chemours			0	0	0
Total (benefit) loss recognized in other comprehensive loss, attributable to DuPont			(15)	573	375
Total recognized in net periodic benefit cost and other comprehensive (income) loss			66	223	124
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
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
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	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	(272)
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)
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
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	591
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)	$ 21