Long-Term Debt, Financing and Capital Lease Obligations (Schedule of Long-term Debt Maturities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$ 8
Long-term Debt, Maturities, Repayments of Principal in Year Two	1,783
Long-term Debt, Maturities, Repayments of Principal in Year Three	1,364
Long-term Debt, Maturities, Repayments of Principal in Year Four	2,652
Long-term Debt, Maturities, Repayments of Principal in Year Five	2,019
Long-term Debt, Maturities, Repayments of Principal after Year Five	12,408
Long-term Debt	20,234
Debt Instrument, Unamortized Premium (Discount), Net	40	52
Debt and Capital Lease Obligations	$ 20,274	$ 20,191

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

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- Definition

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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