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Description of Operations	12 Months Ended
Description of Operations	Mar. 31, 2017
Nature of Operations [Abstract]
Description of Operations	Description of Operations Sprint Corporation, including its consolidated subsidiaries, is a communications company offering a comprehensive range of wireless and wireline communications products and services that are designed to meet the needs of individual consumers, businesses, government subscribers and resellers. The Wireless segment includes retail, wholesale, and affiliate service revenue from a wide array of wireless voice and data transmission services and equipment revenue from the sale or lease of wireless devices and the sale of accessories in the U.S., Puerto Rico and the U.S. Virgin Islands. The Wireline segment includes revenue from domestic and international wireline data communication services in addition to voice, data and IP communication services provided to our Wireless segment. On July 10, 2013, SoftBank Corp., which subsequently changed its name to SoftBank Group Corp., and certain of its wholly-owned subsidiaries (together, "SoftBank") completed the merger (SoftBank Merger) with Sprint Nextel as contemplated by the Agreement and Plan of Merger, dated as of October 15, 2012 (as amended, the Merger Agreement) and the Bond Purchase Agreement, dated as of October 15, 2012 (as amended, the Bond Agreement). As a result of the SoftBank Merger, Starburst II, Inc. (Starburst II) became the parent company of Sprint Nextel. Immediately thereafter, Starburst II changed its name to Sprint Corporation and Sprint Nextel changed its name to Sprint Communications, Inc. (Sprint Communications). As a result of the completion of the SoftBank Merger in which SoftBank acquired an approximate 78% interest in Sprint Corporation, and subsequent open market stock purchases, SoftBank owned approximately 83% of the outstanding common stock of Sprint Corporation as of March 31, 2017.