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Intangible Assets Intangible Assets (Policies)	3 Months Ended
Intangible Assets Intangible Assets (Policies)	Mar. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets, Finite-Lived, Policy [Policy Text Block]	Sprint's customer relationships are amortized using the sum of the years' digits method. We reduce the gross carrying value and associated accumulated amortization when specified intangible assets become fully amortized.

Disclosure of accounting policy for finite-lived intangible assets. This accounting policy also might address: (1) the amortization method used; (2) the useful lives of such assets; and (3) how the entity assesses and measures impairment of such assets.

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