Allowance for Long-Term Receivables (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Long-term receivables past due	$ 25.5
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at December 25, 2010	18.8
Write-offs	(4.2)
Recoveries	0
Provision	9.0	[1]
Currency translation adjustment	(0.3)
Balance at December 31, 2011	23.3
Reclassifications from current receivables	$ 5.2

[1] Provision includes $5.2 million of reclassifications from current receivables.