Comprehensive Income (Loss) Note (Tables)

12 Months Ended

Dec. 31, 2012

Equity [Abstract]

Components Of Accumulated Other Comprehensive Income (Loss)

The components of Accumulated other comprehensive income (loss) are as follows (in millions):

	Pension and Retiree Medical Liability			Unrealized Gain/(Loss) on Investments			Derivative Financial Instruments			Income Tax Benefit/ (Expense)			Total
Balance at December 31, 2011	$	(3,887	)	$	(4	)	$	28		$	(212	)	$	(4,075	)
Current year change	(1,910		)	6									(1,904		)
Amortization of actuarial loss and prior service cost	130			—			—			—			130
Benefit plan modifications	3,345												3,345
Reclassification of derivative financial instruments into earnings	—			—			(3		)	—			(3		)
Change in fair value of derivative financial instruments	—			—			(12		)	—			(12		)
Non-cash tax provision	$	—		$	—		$	—		$	(569	)	$	(569	)
Balance at December 31, 2012	$	(2,322	)	$	2		$	13		$	(781	)	$	(3,088	)