The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

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Goodwill and Other Intangibles Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	4 Months Ended	12 Months Ended
	Dec. 29, 2018	Dec. 31, 2016	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets			$ 0.0	$ 68.6	$ 7.1
Indefinite-lived intangibles	$ 604.5	$ 678.5	604.5	604.5	678.5
Amortization expense			6.2	9.4	$ 14.0
Sperry [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets				$ 68.6
Indefinite-lived intangibles	518.2		$ 518.2
Indefinite-lived Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets	$ 68.6
Indefinite-lived Intangible Assets [Member] \| Stride Rite [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets		$ 7.1