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Interest Rate Swaps in Effect (Details) (USD $) | 6 Months Ended
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Jun. 30, 2012
Interest Rate Swap 1 |
Debt Disclosure [Line Items] |
Notional Amount | $ 20,000,000,000
Fixed Interest Rate | 1.80%
Effective Date | Nov. 23, 2009
Maturity Date | Nov. 23, 2012
Interest Rate Swap 2 |
Debt Disclosure [Line Items] |
Notional Amount | 20,000,000,000
Fixed Interest Rate | 1.56%
Effective Date | Mar. 11, 2010
Maturity Date | Dec. 11, 2012
Interest Rate Swap 3 |
Debt Disclosure [Line Items] |
Notional Amount | 15,000,000,000
Fixed Interest Rate | 0.95%
Effective Date | Aug. 06, 2010
Maturity Date | Dec. 06, 2012
Interest Rate Swap 4 |
Debt Disclosure [Line Items] |
Notional Amount | 25,000,000,000
Fixed Interest Rate | 1.61%
Effective Date | Feb. 23, 2011
Maturity Date | Feb. 24, 2014
Interest Rate Swap 5 |
Debt Disclosure [Line Items] |
Notional Amount | 25,000,000,000
Fixed Interest Rate | 2.52%
Effective Date | Feb. 23, 2011
Maturity Date | Feb. 23, 2016
Interest Rate Swap 6 |
Debt Disclosure [Line Items] |
Notional Amount | 25,000,000,000
Fixed Interest Rate | 0.975%
Effective Date | Jul. 18, 2011
Maturity Date | Jul. 18, 2014
Interest Rate Swap 7 |
Debt Disclosure [Line Items] |
Notional Amount | 15,000,000,000
Fixed Interest Rate | 1.185%
Effective Date | Sep. 12, 2011
Maturity Date | Sep. 12, 2016
Interest Rate Swap 8 |
Debt Disclosure [Line Items] |
Notional Amount | $ 15,000,000,000
Fixed Interest Rate | 0.62%
Effective Date | Sep. 12, 2011
Maturity Date | Sep. 11, 2014

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- Definition The date the entity entered into the derivative. + References No definition available. + Details
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- Definition Aggregate notional amount of interest rate derivatives, which relates to the currency amount specified in the interest rate derivative instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5579245-113959 + Details
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