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Held For Sale, Divestitures and Acquisitions (Preliminary Purchase Price) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 12 Months Ended
Oct. 04, 2021
Jan. 01, 2022
Jan. 01, 2022
Jan. 02, 2021
Dec. 28, 2019
Business Acquisition [Line Items]          
Land financing fees paid by the company     $ 19.8 $ 0.0 $ 0.0
Merger Agreement          
Business Acquisition [Line Items]          
Consideration transferred $ 4,000.0        
Stock issued (in shares)   27      
Share price (in dollars per share) $ 151.00        
Dividends amount (in dollars per share)   $ 6.99 $ 6.99    
Merger Agreement | Zurn          
Business Acquisition [Line Items]          
Fair value of company common stock issued to zurn $ 3,896.3        
Stock based compensation 47.1        
Adjustment amount 30.9        
Land financing fees paid by the company 3.9        
Preexisting relationships (0.8)        
Consideration transferred $ 3,977.4