Inventory - Additional Information (Detail) (Industrial Supply, Inventories, USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Industrial Supply \| Inventories
Inventory Disclosure [Line Items]
Assets pledged as collateral	$ 10.3	$ 7.8

- Definition

The carrying amount, as of the date of the latest financial statement presented, of all assets that are pledged as collateral for the payment of the related debt obligation primarily arising from secured borrowings, repurchase agreements or other current or potential obligations, where the secured party does not have the right by contract or custom to sell or re-pledge the collateral and therefore are not reclassified and separately reported in the statement of financial position.

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