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Debt and Credit Arrangements - Debt and Credit Arrangements (Parenthetical) (Detail) | Dec. 31, 2015 | Dec. 31, 2014
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Australian Dollar Denominated Term Loans Long-term Debt [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 5.59% | 5.59%
Australian Dollar Denominated Secured Notes Short-term Debt [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 3.17% |
Australian Dollar Denominated Long-term Debt [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 3.185% |
Minimum [Member] | USD Denominated Long-term Debt [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 1.29% |
Brazilian Real Denominated Secured Notes Short Term Debt [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 5.35% |
Brazilian Real Denominated Secured Notes Short Term Debt [Member] | Minimum [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate |  | 3.38%
Brazilian Real Denominated Secured Notes Short Term Debt [Member] | Maximum [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate |  | 3.69%

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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 + Details
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