Quarterly Financial Data (Narrative) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	1 Months Ended			3 Months Ended						12 Months Ended			3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Oct. 31, 2012	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2012 Satellite [Member]	Dec. 31, 2013 A-12 Program [Member]
Schedule of Quarterly Financial Information [Line Items]
Benefit/(Charge) Related to Litigation Settlement													$ 121	$ (406)
Income tax benefit recorded				$ 212		$ 145			$ 397
Cash dividends declared, per share	$ 0.73	$ 0.485	$ 0.44	$ 1.215	$ 0.97		$ 0.925	$ 0.88		$ 2.185	$ 1.805	$ 1.70