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Other Assets (Detail) (USD $)
In Millions, unless otherwise specified
Nov. 01, 2014
Feb. 01, 2014
Nov. 02, 2013
Other Assets      
Deferred extended service plan costs $ 64.8 $ 61.9 $ 58.4
Investments 23.5 [1]    
Other assets 45.2 25.3 25.1
Total other assets $ 133.5 $ 87.2 $ 83.5
[1] See Note 14 for additional discussion of the investment balances.