Consolidated Statements of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Comprehensive Income [Abstract]
Net Income	$ 10,540	$ 1,009	$ 854
Other Comprehensive Income (Loss), Net gain (loss) on derivatives	482	211	(167)
Other Comprehensive (Income) Loss, Net change in pension and other benefit liabilities	2,965	(2,022)	(3,021)
Total Other Comprehensive Income (Loss)	3,447	(1,811)	(3,188)
Comprehensive Income (Loss)	$ 13,987	$ (802)	$ (2,334)