Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2011

Fair Value Measurements [Abstract]

Schedule Of Carrying Value And Fair Value Measurement Information For Financial Assets And Liabilities


			Fair Value Measurements Using:
	Carrying Amount	Total Fair Value	Level 1 Inputs	Level 2 Inputs	Level 3 Inputs
	(In millions)
December 31, 2011 assets (liabilities):
Cash equivalents	$ 5,123	$ 5,123	$ 1,369	$ 3,754	$ —
Short-term investments	$ 1,503	$ 1,503	$ 490	$ 1,013	$ —
Long-term investments	$ 84	$ 84	$ —	$ —	$ 84
Commodity derivatives	$ 628	$ 628	$ —	$ 628	$ —
Commodity derivatives	$ (82)	$ (82)	$ —	$ (82)	$ —
Interest rate derivatives	$ 52	$ 52	$ —	$ 52	$ —
Debt	$ (9,780)	$ (11,380)	$ —	$ (11,295)	$ (85)


			Fair Value Measurements Using:
	Carrying Amount	Total Fair Value	Level 1 Inputs	Level 2 Inputs	Level 3 Inputs
	(In millions)
December 31, 2010 assets (liabilities):
Cash equivalents	$ 2,335	$ 2,335	$ 2,335	$ —	$ —
Short-term investments	$ 145	$ 145	$ 145	$ —	$ —
Long-term investments	$ 94	$ 94	$ —	$ —	$ 94
Commodity derivatives	$ 249	$ 249	$ —	$ 249	$ —
Commodity derivatives	$ (192)	$ (192)	$ —	$ (192)	$ —
Interest rate derivatives	$ 140	$ 140	$ —	$ 140	$ —
Debt	$ (5,630)	$ (6,629)	$ —	$ (6,485)	$ (144)

Schedule Of Changes In Level 3 Fair Value Measurements


	Year Ended December 31,
	2011	2010
	(In millions)
Long-term investments balance at beginning of period	$ 94	$ 115
Redemptions of principal	(10)	(21)
Long-term investments balance at end of period	$ 84	$ 94
Debt balance at beginning of period	$ (144)	$ —
Issuance of promissory note	—	(139)
Foreign exchange translation adjustment	1	(9)
Accretion of promissory note	(5)	(3)
Redemptions of principal	63	7
Debt balance at end of period	$ (85)	$ (144)