Significant Transactions Schedule of identifiable assets acquired after Merger (Details) (USD $) In Millions, unless otherwise specified		6 Months Ended		3 Months Ended	6 Months Ended
	Jul. 10, 2013 SoftBank Merger [Member]	Dec. 31, 2013 FCC Licenses [Member] SoftBank Merger [Member]	Dec. 31, 2013 Trademarks [Member] SoftBank Merger [Member]	Jun. 30, 2013 Customer Relationships [Member]	Dec. 31, 2013 Customer Relationships [Member] SoftBank Merger [Member]	Jul. 10, 2013 Customer Relationships [Member] SoftBank Merger [Member]	Dec. 31, 2013 Trademarks [Member] SoftBank Merger [Member]	Jul. 10, 2013 Trademarks [Member] SoftBank Merger [Member]	Dec. 31, 2013 Favorable spectrum leases [Member] SoftBank Merger [Member]	Jul. 10, 2013 Favorable spectrum leases [Member] SoftBank Merger [Member]	Dec. 31, 2013 Favorable tower leases [Member] SoftBank Merger [Member]	Jul. 10, 2013 Favorable tower leases [Member] SoftBank Merger [Member]	Dec. 31, 2013 Other Finite Lived Intangible Assets [Member] SoftBank Merger [Member]	Jul. 10, 2013 Other Finite Lived Intangible Assets [Member] SoftBank Merger [Member]
Business Acquisition [Line Items]
Indefinite-lived Intangible Assets Acquired		$ 35,723	$ 5,935
Finite-lived Intangible Assets Acquired				32	6,923		520		884		589		52
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life						8 years		34 years		23 years		6 years		10 years
Finite-Lived Intangibles	$ 50,626