Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2016

Fair Value Measurements [Abstract]

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

					Fair Value Measurements Using:
	Carrying		Total Fair		Level 1		Level 2		Level 3
	Amount		Value		Inputs		Inputs		Inputs
	(Millions)
March 31, 2016 assets (liabilities):
Cash equivalents	$	1,121	$	1,121	$	1,026	$	95	$	-
Commodity derivatives	$	54	$	54	$	-	$	54	$	-
Commodity derivatives	$	(28)	$	(28)	$	-	$	(28)	$	-
Interest rate derivatives	$	2	$	2	$	-	$	2	$	-
Interest rate derivatives	$	(95)	$	(95)	$	-	$	(95)	$	-
Foreign currency derivatives	$	(26)	$	(26)	$	-	$	(26)	$	-
Debt	$	(12,545)	$	(11,217)	$	-	$	(11,217)	$	-
Capital lease obligations	$	(13)	$	(13)	$	-	$	(13)	$	-
December 31, 2015 assets (liabilities):
Cash equivalents	$	1,871	$	1,871	$	1,471	$	400	$	-
Commodity derivatives	$	35	$	35	$	-	$	35	$	-
Commodity derivatives	$	(18)	$	(18)	$	-	$	(18)	$	-
Interest rate derivatives	$	2	$	2	$	-	$	2	$	-
Interest rate derivatives	$	(22)	$	(22)	$	-	$	(22)	$	-
Foreign currency derivatives	$	8	$	8	$	-	$	8	$	-
Foreign currency derivatives	$	(8)	$	(8)	$	-	$	(8)	$	-
Debt	$	(13,032)	$	(11,927)	$	-	$	(11,927)	$	-
Capital lease obligations	$	(17)	$	(16)	$	-	$	(16)	$	-