Equity - EPS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Basic EPS:
Net Income Available to Ingredion - basic	$ (246)	$ 75
Weighted average number of shares outstanding, basic	67.3	67.1
Basic earnings per common share of Ingredion (in dollars per share)	$ (3.66)	$ 1.12
Effect of Dilutive Securities:
Incremental shares from assumed exercise of dilutive stock options and vesting of dilutive RSUs and other awards		0.7
Diluted EPS:
Net Income Available to Ingredion - diluted	$ (246)	$ 75
Weighted average number of shares outstanding - diluted, Total	67.3	67.8
Diluted earnings per common share of Ingredion (in dollars per share)	$ (3.66)	$ 1.11
Antidilutive securities excluded in calculation of diluted EPS:
Antidilutive securities excluded from computation of earnings per share amount	2.1	1.5