Financial Instruments (Schedule Of Outstanding Hedges (Notional Amount)) (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Euro Notes [Member]
Notional Amount	$ 4,133	$ 3,814
Pound Sterling Notes [Member]
Notional Amount	1,044	1,015
Intercompany Loans And Forecasted Interest Payments [Member]
Notional Amount	3,436	2,183
Forecasted Transactions [Member]
Notional Amount	1,746	1,946
Commodity Contracts [Member]
Notional Amount	465	630
Interest Rate Contracts [Member]
Notional Amount	$ 5,300	$ 5,167