Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Income Tax Disclosure [Abstract]
Unrecognized tax benefits at beginning of year	$ 4.6us-gaap_UnrecognizedTaxBenefits	$ 6.8us-gaap_UnrecognizedTaxBenefits	$ 11.0us-gaap_UnrecognizedTaxBenefits
Gross increases - tax positions in prior periods	2.1	1.5	0.7
Gross decreases - tax positions in prior periods		(1.6)	(4.9)
Gross increases - tax positions in the current period	1.8	0.5	1.2
Settlements with taxing authorities	(1.6)	(2.1)
Lapsing of statutes of limitations	(0.5)	(0.5)	(1.2)
Unrecognized tax benefits at end of year	$ 6.4us-gaap_UnrecognizedTaxBenefits	$ 4.6us-gaap_UnrecognizedTaxBenefits	$ 6.8us-gaap_UnrecognizedTaxBenefits

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

-URI http://asc.fasb.org/extlink&oid=6527854

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-Publisher FASB

-Name Accounting Standards Codification

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

+ References

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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