DEBT - Additional Information (Detail) In Millions |
3 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 3 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2011
USD ($)
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Mar. 31, 2011
USD ($)
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Mar. 31, 2011
Senior Unsecured Revolving Credit Facility
USD ($)
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Sep. 30, 2011
Senior Unsecured Revolving Credit Facility
USD ($)
|
Mar. 31, 2011
Senior Unsecured Revolving Credit Facility
After Amendment
USD ($)
|
Sep. 30, 2011
364-Day Revolving Credit
CAD
|
Mar. 31, 2011
Maximum
After Amendment
|
Mar. 31, 2011
After Amendment
USD ($)
|
Mar. 31, 2011
After Amendment
Minimum
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Sep. 30, 2011
Maximum
|
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| Debt Instrument [Line Items] | ||||||||||
| Credit facility borrowing capacity | $ 850.0 | $ 500.0 | 10.0 | |||||||
| Credit facility expiration date | 2011-07-24 | 2015-02-18 | 2011-06-30 | |||||||
| Line of credit facility, potential maximum borrowing capacity | 750.0 | |||||||||
| Credit facility, available for borrowings | 448.5 | |||||||||
| Line of credit facility outstanding amount | 0 | |||||||||
| Commercial paper notes | 850.0 | 500.0 | ||||||||
| Commercial paper, maturity date | 397 days | 1 day | 90 days | |||||||
| Commercial paper outstanding amount | $ 50.1 |
| X | ||||||||||
- Definition Amount of commercial paper outstanding as of the balance sheet date.
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| X | ||||||||||
- Definition Commercial Paper Maturity Period
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| X | ||||||||||
- Definition Commercial Paper, Maximum Borrowing Capacity
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| X | ||||||||||
- Definition Line of Credit Facility, Potential Maximum Borrowing Capacity
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
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| X | ||||||||||
- Definition Amount borrowed under the credit facility as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Reflects when the credit facility terminates, which may be presented in a variety of ways (year, month and year, day, month and year, quarter). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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