Financial and Other Derivative Instruments (Tables)

6 Months Ended

Jun. 30, 2011

Financial and Other Derivative Instruments (Tables) [Abstract]

Fair value of derivative instruments

(in Millions)	Derivative Assets		Derivative Liabilities
Derivatives designated as hedging instruments:
Interest rate contracts	$	—	$	(1	)
Derivatives not designated as hedging instruments:
Foreign currency exchange contracts	$	16	$	(26	)
Commodity Contracts:
Natural Gas		1,239		(1,337	)
Electricity		503		(463	)
Other		37		(22	)
Total derivatives not designated as hedging instruments	$	1,795	$	(1,848	)
Total derivatives:
Current	$	1,277	$	(1,312	)
Noncurrent		518		(537	)
Total derivatives	$	1,795	$	(1,849	)

	Derivative Assets						Derivative Liabilities
	Current			Noncurrent			Current			Noncurrent
Reconciliation of derivative instruments to Consolidated Statements of Financial Position:
Total fair value of derivatives	$	1,277		$	518		$	(1,312	)	$	(537	)
Counterparty netting		(1,168	)		(463	)		1,168			463
Collateral adjustment		—			(6	)		34			—
Total derivatives as reported	$	109		$	49		$	(110	)	$	(74	)

The following tables present the fair value of derivative instruments as of December 31, 2010:

(in Millions)	Derivative Assets		Derivative Liabilities
Derivatives designated as hedging instruments:
Interest rate contracts	$	—	$	(1	)
Derivatives not designated as hedging instruments:
Foreign currency exchange contracts	$	20	$	(30	)
Commodity Contracts:
Natural Gas		1,986		(2,118	)
Electricity		766		(716	)
Other		76		(71	)
Total derivatives not designated as hedging instruments	$	2,848	$	(2,935	)
Total derivatives:
Current	$	2,011	$	(2,041	)
Noncurrent		837		(895	)
Total derivatives	$	2,848	$	(2,936	)

	Derivative Assets						Derivative Liabilities
	Current			Noncurrent			Current			Noncurrent
Reconciliation of derivative instruments to Consolidated Statements of Financial Position:
Total fair value of derivatives	$	2,011		$	837		$	(2,041	)	$	(895	)
Counterparty netting		(1,871	)		(760	)		1,871			760
Collateral adjustment		(9	)		—			28			25
Total derivatives as reported	$	131		$	77		$	(142	)	$	(110	)

Gain (Loss) Recognized in Income on Derivative

		Gain (Loss)						Gain (Loss)
		Recognized in						Recognized in
		Income on						Income on
	Location of Gain	Derivatives for						Derivatives for
	(Loss) Recognized	Three Months Ended						Six Months Ended
(in Millions)	in Income	June 30						June 30
Derivatives Not Designated As Hedging Instruments	On Derivatives	2011			2010			2011			2010
Foreign currency exchange contracts	Operating Revenue	$	1		$	14		$	(5	)	$	3
Commodity Contracts:
Natural Gas	Operating Revenue		9			17			15			27
Natural Gas	Fuel, purchased power and gas		(4	)		1			(10	)		(6	)
Electricity	Operating Revenue		30			(22	)		29			49
Other	Operating Revenue		2			1			8			1
Other	Operation and maintenance		—			(1	)		—			(1	)
Total		$	38		$	10		$	37		$	73

Goss volume of derivative contracts outstanding

Commodity	Number of Units
Natural Gas (MMBtu)		567,029,409
Electricity (MWh)		56,162,251
Foreign Currency Exchange ($ CAD)		96,943,647