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Components of Inventories (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Apr. 01, 2017
Sep. 29, 2018
Sep. 30, 2017
Dec. 30, 2017
Schedule of Inventory [Line Items]            
Payments to Acquire Businesses, Net of Cash Acquired $ 15.1 $ 152.0   $ 521.9 $ 2,582.1  
Document Period End Date       Sep. 29, 2018    
Finished products 1,924.0     $ 1,924.0   $ 1,461.4
Work in process 196.8     196.8   155.5
Raw materials 528.9     528.9   401.5
Total 2,649.7     2,649.7   2,018.4
Newell Tools [Member]            
Schedule of Inventory [Line Items]            
Payments to Acquire Businesses, Net of Cash Acquired     $ 1,860.0      
Series of Individually Immaterial Business Acquisitions [Member]            
Schedule of Inventory [Line Items]            
Payments to Acquire Businesses, Net of Cash Acquired       102.1   $ 182.9
Inventories [Member] | Newell Tools [Member]            
Schedule of Inventory [Line Items]            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets $ 195.5     $ 195.5