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Other Current Liabilities - Summary of Other Current Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Other current liabilities:
Salaries, wages and benefits	$ 62.7	$ 118.8
Accrued liabilities	484.9	440.2
Total other current liabilities	$ 547.6	$ 559.0

Aggregate carrying amount of current liabilities (due within one year or within the normal operating cycle if longer) not separately disclosed in the balance sheet. Includes costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered and of liabilities not separately disclosed.

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