Benefit Plans - Schedule of Fair Values of Company's Pension Plan Assets (Detail) (USD $) In Millions, unless otherwise specified	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	$ 33.2	$ 27.5	$ 26.4
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	32.8	27.4
Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0.1	0.1
Level 1 [Member] | International Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	12.6	14.8
Level 1 [Member] | Index Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	5.6	3.1
Level 1 [Member] | U.S. Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0.9	1.5
Level 1 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	12.9	7.9
Level 1 [Member] | Balanced Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0.4
Level 1 [Member] | Equity Securities, Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0.3
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0.4	0.1
Level 2 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0.2	0.1
Level 2 [Member] | Insurance Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0.2
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets
Level 3 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets
Level 3 [Member] | International Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets
Level 3 [Member] | Index Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets
Level 3 [Member] | U.S. Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets
Level 3 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets
Level 3 [Member] | Balanced Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets
Level 3 [Member] | Equity Securities, Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets
Level 3 [Member] | Insurance Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets