Business Acquisition - Schedule of Intangible Assets Acquired (Detail) (Pure Ice Acquisition [Member], USD $) In Millions, unless otherwise specified	9 Months Ended
Sep. 30, 2012	Jul. 02, 2012
Business Acquisition [Line Items]
Fair Values of Acquired Intangible Assets		$ 43.1
Customer Relationships [Member]
Business Acquisition [Line Items]
Fair Values of Acquired Intangible Assets		33.3
Customer Relationship	19 years
Trademarks [Member]
Business Acquisition [Line Items]
Fair Values of Acquired Intangible Assets		$ 9.8
Customer Relationship	10 years

The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 52

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_BusinessAcquisitionPurchasePriceAllocationAmortizableIntangibleAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant