Stockholders' Equity (Schedule of Accumulated Other Comprehensive Loss) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
AOCI [Roll Forward]
Accumulated other comprehensive income (loss), beginning balance	$ (8,750)	$ (5,790)	$ (5,771)
Other comprehensive income (loss) attributable to DuPont	104	(2,960)	(19)
Accumulated other comprehensive income (loss), ending balance	(8,646)	(8,750)	(5,790)
Cumulative Translation Adjustment [Member]
AOCI [Roll Forward]
Accumulated other comprehensive income (loss), beginning balance	(244)	213	219
Other comprehensive income (loss) attributable to DuPont	77	(457)	(6)
Accumulated other comprehensive income (loss), ending balance	(167)	(244)	213
Net Revaluation and Clearance of Cash Flow Hedges to Earnings [Member]
AOCI [Roll Forward]
Accumulated other comprehensive income (loss), beginning balance	41	(31)	(65)
Other comprehensive income (loss) attributable to DuPont	(38)	72	34
Accumulated other comprehensive income (loss), ending balance	3	41	(31)
Pension Plans, Defined Benefit [Member]
AOCI [Roll Forward]
Accumulated other comprehensive income (loss), beginning balance	(8,276)	(6,032)	(5,967)
Other comprehensive income (loss) attributable to DuPont	(410)	(2,244)	(65)
Accumulated other comprehensive income (loss), ending balance	(8,686)	(8,276)	(6,032)
Other Long-Term Employee Benefit Plans Defined Benefit [Member]
AOCI [Roll Forward]
Accumulated other comprehensive income (loss), beginning balance	(274)	58	41
Other comprehensive income (loss) attributable to DuPont	476	(332)	17
Accumulated other comprehensive income (loss), ending balance	202	(274)	58
Unrealized Gain (Loss) on Securities [Member]
AOCI [Roll Forward]
Accumulated other comprehensive income (loss), beginning balance	3	2	1
Other comprehensive income (loss) attributable to DuPont	(1)	1	1
Accumulated other comprehensive income (loss), ending balance	$ 2	$ 3	$ 2