Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Basic EPS:
Net Income Available to Ingredion	$ 107.9	$ 118.6	$ 298.2	$ 293.8
Weighted average number of shares outstanding, basic	71.6	73.0	71.6	74.2
Basic earnings per common share of Ingredion (in dollars per share)	$ 1.51	$ 1.62	$ 4.17	$ 3.96
Incremental shares from assumed exercise of dilutive stock options and vesting of dilutive RSUs, RSAs and other awards	1.3	1.3	1.3	1.3
Diluted EPS:
Net Income Available to Ingredion	$ 107.9	$ 118.6	$ 298.2	$ 293.8
Weighted average number of shares outstanding, diluted	72.9	74.3	72.9	75.5
Diluted earnings per common share of Ingredion (in dollars per share)	$ 1.48	$ 1.60	$ 4.09	$ 3.89
Antidilutive securities excluded in calculation of diluted EPS:
Antidilutive securities excluded from computation of earnings per share amount	0.3		0.3	0.4