Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Basic EPS:
Net Income Available to Ingredion - basic	$ 140	$ 124
Weighted average number of shares outstanding, basic	72.3	72.2
Basic earnings per common share of Ingredion (in dollars per share)	$ 1.94	$ 1.72
Effect of Dilutive Securities:
Incremental shares from assumed exercise of dilutive stock options and vesting of dilutive RSUs and other awards	1.3	1.5
Diluted EPS:
Net Income Available to Ingredion - diluted	$ 140	$ 124
Weighted Average Number of Shares Outstanding, Diluted, Total	73.6	73.7
Diluted earnings per common share of Ingredion (in dollars per share)	$ 1.90	$ 1.68
Antidilutive securities excluded in calculation of diluted EPS:
Antidilutive securities excluded from computation of earnings per share amount	0.3	0.3