This item represents the aggregate carrying amount of all cost-method investments as reported on or included in the balance sheet. The original cost of the investments may differ from the aggregate carrying amount disclosed due to various adjustments such as: (i) dividends received in excess of earnings after the date of investment that are considered a return of investment and therefore recorded as reductions to cost of the investment, or (ii) a series of operating losses of an investee or other factors which may indicate that a decrease in value of the investment has occurred which is other than temporary and accordingly such decrease in value has been recognized.

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-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

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-Paragraph 6

-Subparagraph a

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

-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

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-Publisher FASB

-Name Accounting Standards Codification

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-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 03-1

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

+ Details

- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References+ Details

Fair Value of Assets and Liabilities (Details 6) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011
Financial assets
Mortgage loans	$ 6,434	$ 6,570
Financial liabilities
Long-term debt	6,556	6,057
Liability for collateral	827	808	674	462
Carrying value
Financial assets
Mortgage loans	6,434	6,570
Cost method limited partnerships	1,425	1,406
Bank loans	809	682
Agent loans	318	319
Financial liabilities
Contract holder funds on investment contracts	26,439	27,014
Long-term debt	6,556	6,057
Liability for collateral	827	808
Fair Value
Financial assets
Mortgage loans	6,846	6,886
Cost method limited partnerships	1,748	1,714
Bank loans	818	684
Agent loans	311	314
Financial liabilities
Contract holder funds on investment contracts	27,215	28,019
Long-term debt	7,616	7,141
Liability for collateral	$ 827	$ 808