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Non-Cash Activities (Details) (USD $)
In Millions, unless otherwise specified |
Mar. 31, 2013
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Dec. 31, 2012
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|---|---|---|
| Nonmonetary Transactions [Abstract] | ||
| Expenditures included in construction trade payables | $ 7.7 | $ 15.7 |
| X | ||||||||||
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- Definition
Expenditures Included In Construction Trade Payables No definition available.
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| X | ||||||||||
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- Details
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