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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 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]        
Income from continuing operations, net of tax $ 99.9 $ 129.6 $ 304.7 $ 347.3
Less: Noncontrolling interest 0.1 0.1 0.1 0.1
Income from continuing operations for earnings per share 99.8 129.5 304.6 347.2
Loss from discontinued operations, net of tax     (0.2) (2.6)
Net income attributable to Fortune Brands $ 99.8 $ 129.5 $ 304.4 $ 344.6
Basic        
Continuing operations $ 0.70 $ 0.84 $ 2.09 $ 2.26
Discontinued operations       (0.02)
Net income attributable to Fortune Brands common stockholders 0.70 0.84 2.09 2.24
Diluted        
Continuing operations 0.69 0.83 2.06 2.22
Discontinued operations       (0.02)
Net income attributable to Fortune Brands common stockholders $ 0.69 $ 0.83 $ 2.06 $ 2.20
Basic average shares outstanding 142.4 153.5 145.8 153.7
Stock-based awards 1.8 2.4 1.9 2.5
Diluted average shares outstanding 144.2 155.9 147.7 156.2
Antidilutive stock-based awards excluded from weighted-average number of shares outstanding for diluted earnings per share 1.2 0.6 1.1 0.6