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Goodwill and Intangible Assets - Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 27, 2013	Oct. 28, 2012	Oct. 27, 2013	Oct. 28, 2012
Goodwill and Intangible Assets [Line Items]
Increase in finite-lived intangible assets			$ 10.3
Amortization expense related to finite-lived intangible assets	7.3	8.2	22.4	21.1
Decrease in indefinite-lived intangible assets			(10.0)
Impairment of indefinite-lived intangible assets			$ 2.6

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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