Other Income, Net (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Other Income, Net
Canadian Oil Sands	$ 10	$ 9
Interest	4	5
Derivative ineffectiveness, net	3	2
Refinery income, net	3	5
Development projects, net	1	14
Gain on asset sales, net	1	10
Reduction of allowance for loan receivable	0	21
Foreign currency exchange, net	(3)	(15)
Impairment of marketable securities	(4)	(24)
Other	11	6
Total	$ 26	$ 33

No authoritative reference available.

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