Recent Accounting Pronouncements (Policies)	3 Months Ended
Mar. 31, 2012
Recent Accounting Pronouncement [Abstract]
Offsetting Assets and Liabilities	In December 2011, the FASB issued ASU 2011-11, Disclosures about Offsetting Assets and Liabilities, which requires enhanced disclosures for financial instruments subject to enforceable master netting arrangements. This requirement will be effective retrospectively for annual and interim periods beginning on or after January 1, 2013. The adoption of this guidance is not expected to have a material impact on our consolidated financial statements.

Disclosure of accounting policy for offsetting or not offsetting fair value amounts recognized for derivative instruments against such amounts recognized for the right to reclaim cash collateral (a receivable) or the obligation to return cash collateral (a payable) arising from derivative instruments recognized at fair value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FIN39-1

-Paragraph 10, 10A, 10B

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41675-113959

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