Equity - EPS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Basic EPS:
Net Income Available to Ingredion - basic	$ 99	$ 95	$ 304	$ 349
Weighted average number of shares outstanding, basic	66.9	71.2	66.9	71.8
Basic earnings per common share of Ingredion (in dollars per share)	$ 1.48	$ 1.33	$ 4.54	$ 4.86
Effect of Dilutive Securities:
Incremental shares from assumed exercise of dilutive stock options and vesting of dilutive RSUs and other awards	0.5	0.7	0.5	0.9
Diluted EPS:
Net Income Available to Ingredion - diluted	$ 99	$ 95	$ 304	$ 349
Weighted Average Number of Shares Outstanding, Diluted, Total	67.4	71.9	67.4	72.7
Diluted earnings per common share of Ingredion (in dollars per share)	$ 1.47	$ 1.32	$ 4.51	$ 4.80
Antidilutive securities excluded in calculation of diluted EPS:
Antidilutive securities excluded from computation of earnings per share amount	1.4	0.6	1.1	0.5