Accumulated Other Comprehensive Loss (Tables)

6 Months Ended

Jun. 30, 2011

Accumulated Other Comprehensive Loss.

Components of accumulated other comprehensive loss

(in millions)	Unrealized Gain (Loss) on Cash Flow Hedges			Pension and PBOP – Net Gain (Loss)			Pension and PBOP – Prior Service Cost			Accumulated Other Comprehensive Loss
Balance at December 31, 2010	$	16		$	(87	)	$	(5	)	$	(76	)
Current period change		(25	)		4			—			(21	)
Balance at June 30, 2011	$	(9	)	$	(83	)	$	(5	)	$	(97	)