Document and Entity Information - shares	3 Months Ended
	Jun. 30, 2019	Aug. 06, 2019
Cover page.
Document Transition Report	false
Title of 12(b) Security	Common stock, $0.01 par value
Entity Incorporation, State or Country Code	DE
Document Quarterly Report	true
Entity Tax Identification Number	46-1170005
Entity Address, Address Line One	6200 Sprint Parkway,
Entity Address, City or Town	Overland Park,
Entity Address, State or Province	KS
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Trading Symbol	S
Entity Registrant Name	SPRINT CORPORATION
Entity Central Index Key	0000101830
Current Fiscal Year End Date	--03-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		4,092,896,454
Entity File Number	1-04721
City Area Code	913
Local Phone Number	794-1091
Entity Address, Postal Zip Code	66251
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false