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Goodwill and Indefinite-Lived Intangibles - Carrying Amount of Goodwill and Indefinite-Lived Intangibles (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 15, 2013	Dec. 29, 2012
Goodwill And Intangible Assets [Line Items]
Goodwill, Beginning balance	$ 459.9	$ 39.1
Goodwill, Acquisition adjustments	(0.7)
Indefinite-Lived Intangibles, Acquisition adjustments
Goodwill and other intangibles, Acquisition adjustments	(0.7)
Goodwill, Foreign currency translation effects	(1.4)	1.2
Goodwill, Ending balance	457.8	459.9
Indefinite-Lived Intangibles, Beginning balance	679.8	17.5
Indefinite-Lived Intangibles, Foreign currency translation effects		0.5
Indefinite-Lived Intangibles, Ending balance	679.8	679.8
Goodwill and other intangibles, Beginning balance	1,139.7	56.6
Goodwill and other intangibles, Foreign currency translation effects	(1.4)	1.7
Goodwill and other intangibles, Ending balance	1,137.6	1,139.7
PLG [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill, Intangibles purchased		419.6
Indefinite-Lived Intangibles, Intangibles purchased		661.8
Goodwill and other intangibles, Intangibles purchased		$ 1,081.4

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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