Equity - EPS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Basic EPS:
Net Income Available to Ingredion - basic	$ 75	$ 100
Weighted average number of shares outstanding, basic	67.1	66.8
Basic earnings per common share of Ingredion (in dollars per share)	$ 1.12	$ 1.50
Effect of Dilutive Securities:
Incremental shares from assumed exercise of dilutive stock options and vesting of dilutive RSUs and other awards	0.7	0.6
Diluted EPS:
Net Income Available to Ingredion - diluted	$ 75	$ 100
Weighted Average Number of Shares Outstanding, Diluted, Total	67.8	67.4
Diluted earnings per common share of Ingredion (in dollars per share)	$ 1.11	$ 1.48
Antidilutive securities excluded in calculation of diluted EPS:
Antidilutive securities excluded from computation of earnings per share amount	1.5	1.0