Supplemental Balance Sheet Information (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Accounts Receivable
Accounts receivable	$ 193.5		$ 238.8
Less reserves and allowances	(17.3)	[1]	(18.0)	[1]
Accounts receivable, net	176.2		220.8
Inventories
Finished goods	118.4		146.9
Work in process	6.9		6.4
Raw materials and supplies	8.3		12.7
Total inventories	133.6		166.0
Other Current Assets
Nontrade Receivables	15.4		15.1
Deferred income taxes	6.1		4.7
Prepaid expenses	4.5		5.4
Hedging asset	7.7		5.5
Assets held for sale	30.5		2.5
Restricted cash	2.4		7.5
Other	25.6		20.9
Total other current assets	92.2		61.6
Property, Plant and Equipment
Property, plant and equipment	221.8		222.6
Less accumulated depreciation	(166.0)		(163.7)
Property, plant and equipment, net	55.8		58.9
Other Assets
Deferred income taxes	11.3		9.3
Pension assets	5.9		6.6
Credit facility fees	2.3		2.3
Other	3.2		3.9
Total other assets	22.7		22.1
Other Current Liabilities
Rebates	33.1		44.8
Accrued copyright levies	29.1		27.7
Accrued payroll	10.0		11.4
Accrued royalties	6.4		7.5
Deferred revenue	7.2		6.9
Employee separation costs	11.9		16.7
Hedging liability	0.6		1.3
Other	40.1		42.1
Total other current liabilities	138.4		158.4
Other Liabilities
Pension liabilities	27.1		28.1
Deferred revenue	2.5		2.5
Deferred income taxes	3.5		2.1
Other	17.5		19.3
Total other liabilities	$ 50.6		$ 52.0

[1] Accounts receivable reserves and allowances include estimated amounts for customer returns, discounts on payment terms and the inability of certain customers to make the required payment.