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DEBT AND CREDIT FACILITIES (Narrative) (Details)
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6 Months Ended | 12 Months Ended | 6 Months Ended | 6 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Jun. 30, 2013
USD ($)
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Dec. 31, 2012
USD ($)
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Jun. 30, 2013
Term Loan [Member]
USD ($)
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Dec. 31, 2012
Unsecured Credit Facility [Member]
Quarter
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Jun. 30, 2013
Revolving Loan [Member]
USD ($)
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Dec. 31, 2012
Revolving Loan [Member]
USD ($)
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Jun. 30, 2013
Revolving Loan [Member]
Maximum [Member]
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Dec. 28, 2012
$270 Million Senior Notes [Member]
USD ($)
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Jun. 30, 2013
Bank Contingent Instrument Facility and Cash Advance Facility [Member]
USD ($)
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Jun. 30, 2013
Bank Contingent Instrument Facility and Cash Advance Facility [Member]
AUD
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Dec. 31, 2012
Bank Contingent Instrument Facility and Cash Advance Facility [Member]
USD ($)
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Dec. 31, 2012
Bank Contingent Instrument Facility and Cash Advance Facility [Member]
AUD
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| Line of Credit Facility [Line Items] | ||||||||||||||||
| Revolving credit facility, borrowing capacity | $ 36,600,000 | 40,000,000 | $ 41,600,000 | |||||||||||||
| Financial covenant, debt to earnings ratio | 3.5 | |||||||||||||||
| Debt instrument, face amount | 4,650,000,000 | 5,497,100,000 | 1,750,000,000.00 | 1,750,000,000.00 | 270,000,000 | |||||||||||
| Number of preceding quarters to calculate financial covenant | 4 | |||||||||||||||
| Financial covenant, interest coverage ratio | 2.50 | 2.5 | ||||||||||||||
| Extinguishment of Debt, Amount | 847,100,000 | |||||||||||||||
| Deferred Finance Costs, Net | 7,100,000 | |||||||||||||||
| Credit facility, amount outstanding | 440,000,000 | [1] | 325,000,000 | [1] | 20,800,000 | 22,700,000 | 26,000,000 | 25,000,000 | ||||||||
| Credit facility remaining capacity | 1,300,000,000 | 1,400,000,000 | 15,800,000 | 17,300,000 | 15,600,000 | 15,000,000 | ||||||||||
| Letters of credit outstanding | 92,600,000 | 96,900,000 | ||||||||||||||
| Debt Instrument, Minimum Tangible Net Worth Required Under Agreement, as of the End of Each Fiscal Quarter in the Next Fiscal Year | $ 4,600,000,000 | |||||||||||||||
| Debt Instrument, Maximum Total Funded Debt to Capitalization Required Until the End of the Next Fiscal Year End | 52.50% | |||||||||||||||
| Potential Increase in Borrowing Costs on Outstanding Borrowings | 0.50% | |||||||||||||||
| Potential Increase in Borrowing Costs on Unused Borrowing Capacity | 0.10% | |||||||||||||||
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