Stockholders' Equity Noncontrolling Interest (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018
Noncontrolling Interest [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	46.50%
Payment for acquisition of subsidiary's interest from the non-controlling interest	$ (60,000,000)	$ 0	[1]	$ 0	[1]
Net Deferred Tax Liability	(429,000,000)	(633,000,000)
EID [Member]
Noncontrolling Interest [Line Items]
Payment for acquisition of subsidiary's interest from the non-controlling interest	$ (60,000,000)	$ 0	[2]	$ 0	[2]
$4.50 Series Preferred Stock [Member] | EID [Member]
Noncontrolling Interest [Line Items]
Preferred Stock, Shares Authorized	23,000,000	23,000,000
Preferred Stock, Shares Issued	1,673,000	1,673,000
Preferred Stock, Redemption Amount	$ 120	$ 120
$3.50 Series Preferred Stock [Member] | EID [Member]
Noncontrolling Interest [Line Items]
Preferred Stock, Shares Authorized	23,000,000	23,000,000
Preferred Stock, Shares Issued	700,000	700,000
Preferred Stock, Redemption Amount	$ 102	$ 102
Corteva [Member] | EID [Member]
Noncontrolling Interest [Line Items]
Ownership interest in an entity	100.00%

[1] The cash flows for the years ended December 31, 2018 and 2019 includes cash flows of EID's ECP and Specialty Products Entities.

[2] The cash flows for the year ended December 31, 2018 and 2019 includes cash flows of EID's ECP and Specialty Products Entities