Document and Entity Information - shares	3 Months Ended
	Jun. 30, 2016	Aug. 04, 2016
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q1
Trading Symbol	S
Entity Registrant Name	SPRINT CORP
Entity Central Index Key	0000101830
Current Fiscal Year End Date	--03-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		3,978,362,186