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Components of Inventories (Detail) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2018
Apr. 01, 2017
Dec. 30, 2017
Schedule of Inventory [Line Items]      
Payments to Acquire Businesses, Net of Cash Acquired $ 1.2 $ 2,435.4  
Document Period End Date Mar. 31, 2018    
Finished products $ 1,694.7   $ 1,461.4
Work in process 175.9   155.5
Raw materials 479.7   401.5
Total 2,350.3   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     $ 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