Income Taxes - Narrative (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended
	May 31, 2012	Dec. 30, 2012	Dec. 25, 2011	Dec. 26, 2010
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at the beginning of period		$ 10.1	$ 12.4	$ 12.6
Increases related to prior periods (acquired entities)		3.7	0.5	0.3
Increases related to current year tax positions		0	0.2	0.2
Expiration of applicable statutes of limitations		(0.1)	(0.6)	(0.7)
Settlements with taxing authorities		(0.3)	(2.4)
Balance at the end of period		13.4	10.1	12.4
Unrecognized tax benefits that if recognized would affect effective tax rate		13.4
Amount that would become a deferred tax asset included in unrecognized tax benefits that would impact the effective tax rate		10.8
Income tax penalties and interest expense		0.4	0.3	0.1
Benefit for income tax penalties and interest related to reversal of prior positions		0.1	0.4	0.4
Total interest and penalties accrued		0.7	0.4	0.5
Unrecognized tax benefits that will expire within the next 12 months		1.5
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
Domestic		(120.3)	(20.7)	1.9
Foreign		5.8	(0.9)	0
Income (loss) from continuing operations before income taxes		(114.5)	(21.6)	1.9
Federal income taxes:
Current		0	(1.5)	0.1
Deferred		(3.5)	0.6	1.6
Total Federal		(3.5)	(0.9)	1.7
State and local income taxes
Current		0.8	3.1	(12.6)
Deferred		0.4	0.8	(1.8)
Total State and local		1.2	3.9	(14.4)
Foreign income taxes:
Current		0.1	0.4	0
Deferred		0.6	(1.5)	0
Total Foreign		0.7	(1.1)	0
Federal statutory income tax rate		35.00%	35.00%	35.00%
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Income tax expense (benefit) at federal statutory rate		(40.1)	(7.6)	0.6
State taxes, net of federal tax benefit and valuation allowance		0.7	3.1	1.9
Difference in tax rates between U.S. and foreign		(1.5)	(0.1)	0
Nondeductible expense		0.3	0.4	0.2
Increase (decrease) in reserve for uncertain tax positions		0.1	(1.7)	(0.2)
Transaction costs		0.1	2.3	0.7
Changes to indefinite life items and separate state deferred taxes		(3.0)	1.5	0
Impact of purchase accounting		0	0	(13.6)
Goodwill impairment		27.6	0	0
Total		(1.6)	1.9	(12.7)
Deferred tax assets:
Allowance for doubtful accounts		0.4	0.8
Sundry accruals		3.3	7.8
Vacation accrual		5.1	5.0
Stock-based compensation		4.6	4.9
Payroll related accruals		2.7	2.3
Lease accruals		9.7	9.5
Investments		1.9	2.1
Net operating loss carryforwards		124.8	104.1
Tax credit carryforwards		3.7	3.5
Deferred revenue		2.1	1.5
Reserves and other		10.2	9.8
Gross deferred tax assets		168.5	151.3
Valuation allowance		(110.4)	(98.8)
Total deferred tax assets, net of allowance		58.1	52.5
Deferred tax liabilities:
Unearned revenue		(42.0)	(15.4)
Other intangibles		(15.7)	(37.0)
Property and equipment, principally due to differences in depreciation		(7.9)	(10.1)
Total deferred tax liabilities		(65.6)	(62.5)
Net deferred tax asset (liability)		(7.5)	(10.0)
Federal annual utilization of NOL carryforwards limit, next five years	28.1
Threshold period for change in allowed annual amount of NOL to be recognized	5 years
Federal annual utilization of NOL carryforwards limit, after year five	11.6
Net increase in valuation allowance		11.6
Share-based compensation cost
Deferred tax liabilities:
Operating loss carryforwards		14.4
Foreign
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Increase (decrease) in valuation allowance		0	(0.7)	0
Federal
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Increase (decrease) in valuation allowance		14.2	4.7	(2.3)
Deferred tax liabilities:
Operating loss carryforwards		344.7
State
Deferred tax liabilities:
Operating loss carryforwards		$ 187.8