Lease Commitments (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012	Dec. 25, 2011
Leases [Abstract]
Sublease income on operating leases	$ 7.1
Capital Leases
2014	0.4
2015	0.1
2016	0
2017	0
2018	0
Thereafter	0
Total future minimum lease payments	0.5
Less amount representing interest	0.1
Present value of capital lease obligations	0.4
Less current portion	0.3	0.5
Capital lease obligations, net of current portion	0.1	0.4
Net Operating Leases
2014	15.9
2015	13.0
2016	10.9
2017	9.6
2018	8.8
Thereafter	12.7
Total future minimum lease payments	70.9
Capital Leased Assets [Line Items]
Property under capital leases by major class, gross	1.9	2.0
Less: Accumulated amortization	1.7	1.5
Property under capital leases by major class, net	0.2	0.5
Amortization expense related to capital leases	0.2	0.1	0.1
Gross rent expense under operating leases	16.7	21.1	12.8
Sublease income	2.3	2.7	1.3
Accrual for Unused Facilities [Roll Forward]
Accrual for excess facilities - beginning balance	18.7	18.5
Fair value of liability assumed in acquisition		1.8
Adjustments of excess facility accruals	(4.7)
Cash payments	(1.6)	(1.6)
Accrual for excess facilities - ending balance	12.4	18.7	18.5
Deferred rent	3.2	1.3	1.0
Integral
Capital Leased Assets [Line Items]
Rentable area of acquired property			131,450
Area subleased			83,000
Accrual for Unused Facilities [Roll Forward]
Accrual for excess facilities - ending balance			19.0
Facilities
Capital Leased Assets [Line Items]
Property under capital leases by major class, gross	1.0	1.0
Vehicles
Capital Leased Assets [Line Items]
Property under capital leases by major class, gross	0.5	0.5
Office equipment
Capital Leased Assets [Line Items]
Property under capital leases by major class, gross	$ 0.4	$ 0.5