Fair Value Measurements And Disclosure (Long-Term Debt And Other Financial Instruments) (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Carrying Amount [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Notes and debentures	$ 66,328	$ 64,256
Commercial paper	5	1,625
Bank borrowings	17	27
Investment securities	2,229	2,185
Fair Value [Member]
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Notes and debentures	70,969	69,313
Commercial paper	5	1,625
Bank borrowings	17	27
Investment securities	$ 2,229	$ 2,185

Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents notes payable as of the balance sheet date.

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