Earnings Per Share Share Count Information (Details) - shares		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Jun. 01, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted Average Number of Shares Outstanding, Basic	[1]	749,200,000	749,400,000	749,600,000	749,400,000
Dilutive effect of equity compensation plans	[2]	2,400,000	600,000	2,400,000	300,000
Weighted Average Number of Shares Outstanding, Diluted		751,600,000	750,000,000.0	752,000,000.0	749,700,000
Stock options and restricted stock units excluded from EPS	[3]	11,900,000	7,800,000	11,000,000.0	7,800,000
Common Stock, Shares Authorized		1,666,667,000	1,666,667,000	1,666,667,000	1,666,667,000	1,666,667,000
Corteva [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common Stock, Shares Authorized							748,800,000
Shares in which vesting conditions were met							600,000

[1] Share amounts for all periods prior to the Corteva Distribution were based on 748.8 million shares of Corteva, Inc. common stock distributed to holders of DowDuPont's common stock on June 1, 2019, plus 0.6 million of additional shares in which accelerated vesting conditions have been met.

[2] Diluted earnings per share considers the impact of potentially dilutive securities except in periods in which there is a loss because the inclusion of the potential common shares would have an anti-dilutive effect.

[3] These outstanding potential shares of common stock relating to stock options, restricted stock units and performance-based restricted stock units were excluded from the calculation of diluted earnings per share because the effect of including them would have been anti-dilutive.