Marketable Investment Securities, Restricted Cash and Cash Equivalents, and Other Investment Securities (Details 2) (USD $)	3 Months Ended			12 Months Ended
	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 VRDNs	Dec. 31, 2013 ARS and other, noncurrent	Dec. 31, 2013 Debt securities Clearwire	Dec. 31, 2012 Debt securities Clearwire
Other investment securities:
Settlement period				5 days
Carrying value of debt securities of a single issuer						$ 108,000,000	$ 751,000,000
Fair value of debt securities of a single issuer						186,000,000	951,000,000
Restricted cash related to litigation released during the period	42,000,000
ARS and other investments, total carrying value		133,652,000	106,172,000		134,000,000
ARS and other investments, portion for which the fair value election was made					$ 89,000,000