Supplemental Balance Sheet Disclosures (Accrued Expenses And Other Current Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Supplemental Balance Sheet Disclosures [Abstract]
Insurance	$ 58.7	$ 65.3
Payroll and bonuses	49.5	45.7
Sales and payroll taxes	41.6	41.1
Advertising	21.6	30.8
Gift card deferred revenue	21.9	20.6
Other	70.6	84.4
Total accrued expenses and other current liabilities	$ 263.9	$ 287.9