Significant Transactions (Business Acquisition Pro Forma Information) (Details) (Combined Softbank and Clearwire transactions [Member], USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Combined Softbank and Clearwire transactions [Member]
Business Acquisition, Pro Forma Revenue	$ 35,953	$ 35,918
Business Acquisition, Pro Forma Net Income (Loss)	$ (4,290)	$ (5,141)
Business Acquisition, Pro Forma Earnings Per Share, Basic	$ (1.12)	$ (1.35)