SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance for Sales Returns and Doubtful Accounts [Member]
Allowance for sales returns and doubtful accounts [Roll Forward]
Balance at Beginning of Period	$ 14.7	$ 17.9	$ 22.5
Charged to Expenses	5.0	3.2	3.3
Write-offs	(4.2)	(6.4)	(6.8)
Other	0	0	(1.1)	[1]
Balance at End of Period	15.5	14.7	17.9
Allowance for Deferred Tax Assets, Current [Member]
Allowance for sales returns and doubtful accounts [Roll Forward]
Balance at Beginning of Period	1.5	1.5	1.5
Charged to Expenses	0.7	0	0
Write-offs	0	0	0
Other	0	0	0
Balance at End of Period	2.2	1.5	1.5
Allowance for Deferred Tax Assets, Noncurrent [Member]
Allowance for sales returns and doubtful accounts [Roll Forward]
Balance at Beginning of Period	28.4	27.7	28.3
Charged to Expenses	(19.5)	0.6	0
Write-offs	0	0	0
Other	0	0.1	(0.6)
Balance at End of Period	$ 8.9	$ 28.4	$ 27.7

[1] WStore opening balance sheet adjustment.