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Restructuring Activities Restructuring Activities (Impairment Fair Value) (Details) - USD ($)
$ in Millions
 3 Months Ended 4 Months Ended 12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Restructuring costs - SG&A       $ 72.9 $ 34.9 $ 29.5
Property, plant and equipment, net $ 136.7 $ 146.1   136.7 146.1  
Indefinite-lived intangibles 604.5 678.5 $ 685.4 604.5 678.5 685.4
Impairment of intangible assets       68.6 7.1 5.1
Consumer Direct Operations [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Restructuring costs - SG&A       (0.7) 11.0 17.3
Impairment of property, plant and equipment [Member] | Consumer Direct Operations [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Restructuring costs - SG&A       0.0 $ 0.2 $ 5.4
Indefinite-lived Intangible Assets [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Impairment of intangible assets 68.6          
Stride Rite [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Indefinite-lived intangibles $ 7.9     $ 7.9    
Stride Rite [Member] | Indefinite-lived Intangible Assets [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Impairment of intangible assets   $ 7.1 $ 2.5