Borrowings by Contractual Maturities (Detail) (USD $) In Thousands	Jun. 30, 2011
Debt Disclosure [Line Items]
2011	$ 3,203,126
2012	289,782
2013	147,744
2014	539,380
2015	210,126
Later years	1,297,747
No stated maturity	936,000
Subtotal	6,623,905
Less: Discount	478,995
Total borrowings	6,144,910
Assets sold under agreements to repurchase
Debt Disclosure [Line Items]
2011	1,458,132
2012	75,000
2013	49,000
2014	350,000
2015	174,135
Later years	464,055
Subtotal	2,570,322
Total borrowings	2,570,322
Short-term borrowings
Debt Disclosure [Line Items]
2011	151,302
Subtotal	151,302
Total borrowings	151,302
Notes payable
Debt Disclosure [Line Items]
2011	1,593,692
2012	214,782
2013	98,744
2014	189,380
2015	35,991
Later years	833,692
No stated maturity	936,000
Subtotal	3,902,281
Less: Discount	478,995
Total borrowings	$ 3,423,286

Subtotal of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, collateralized financings, and capital lease obligations.

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Debt Disclosure [Line Items]

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Amount of borrowings maturing in year four following the date of the latest balance sheet presented in the financial statements.

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Amount of borrowings maturing in year one following the date of the latest balance sheet presented in the financial statements.

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Amount of borrowings maturing in year three following the date of the latest balance sheet presented in the financial statements.

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Amount of borrowings maturing in year two following the date of the latest balance sheet presented in the financial statements.

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Amount of borrowings maturing after year five following the date of the latest balance sheet presented in the financial statements.

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Amount of borrowings maturing within the next twelve months following the date of the latest balance sheet presented in the financial statements.

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Amount of borrowings with no stated maturities as of the date of the latest balance sheet presented in the financial statements.

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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, collateralized financings, and capital lease obligations.

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The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number APB14-1
-Paragraph 31
-Subparagraph b
-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 AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 21
-Paragraph 16, 20
-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 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

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