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Cash Flow Information (Schedule Of Cash Paid For Interest And Income Taxes) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash Flow Information [Abstract]
Interest, net of amount capitalized	$ 491	$ 452	$ 396
Income taxes, net of amount refunded	$ 382	$ (67)	$ 168

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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- Definition

The amount of cash paid for interest during the period net of cash paid for interest that is capitalized.

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