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Earnings Per Share - Computations of Earnings per Common Share (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]    
Income from continuing operations, net of tax $ 75.1 $ 77.4
Less: Noncontrolling interest (0.1)  
Income from continuing operations for EPS 75.2 77.4
Loss from discontinued operations (0.2)  
Net income attributable to Fortune Brands $ 75.0 $ 77.4
Basic    
Continuing operations $ 0.50 $ 0.50
Discontinued operations 0 0
Net income attributable to Fortune Brands common stockholders 0.50 0.50
Diluted    
Continuing operations 0.49 0.50
Discontinued operations 0 0
Net income attributable to Fortune Brands common stockholders $ 0.49 $ 0.50
Basic average shares outstanding 149.9 153.3
Stock-based awards 2.2 2.9
Diluted average shares outstanding 152.1 156.2
Antidilutive stock-based awards excluded from weighted-average number of shares outstanding for diluted earnings per share 0.5 0.6