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Components of Inventories (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2017
Apr. 01, 2017
Oct. 01, 2016
Sep. 30, 2017
Oct. 01, 2016
Dec. 31, 2016
Schedule of Inventory [Line Items]            
Payments to Acquire Businesses, Net of Cash Acquired $ 152.0   $ 38.3 $ 2,582.1 $ 59.3 $ 59.3
Document Period End Date       Sep. 30, 2017    
Finished products 1,648.1     $ 1,648.1   1,044.2
Work in process 166.0     166.0   133.3
Raw materials 433.3     433.3   300.5
Total 2,247.4     2,247.4   $ 1,478.0
Newell Tools [Member]            
Schedule of Inventory [Line Items]            
Payments to Acquire Businesses, Net of Cash Acquired   $ 1,840.0        
Series of Individually Immaterial Business Acquisitions [Member]            
Schedule of Inventory [Line Items]            
Payments to Acquire Businesses, Net of Cash Acquired 152.0 $ 26.1        
Inventories [Member] | Newell Tools [Member]            
Schedule of Inventory [Line Items]            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets 198.2     198.2    
Inventories [Member] | Craftsman [Member]            
Schedule of Inventory [Line Items]            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets $ 15.7     $ 15.7