Cover - USD ($)	12 Months Ended
	Mar. 28, 2020	May 18, 2020	Sep. 28, 2019
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Mar. 28, 2020
Document Transition Report	false
Entity File Number	0-17795
Entity Registrant Name	CIRRUS LOGIC, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0024818
Entity Address, Address Line One	800 W. 6th Street
Entity Address, City or Town	Austin,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	78701
City Area Code	(512)
Local Phone Number	851-4000
Title of 12(g) Security	Common stock, $0.001 par value
Trading Symbol	CRUS
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Smaller Reporting Company	false
Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 2,157,695,761
Entity Common Stock, Shares Outstanding (in shares)		58,363,550
Documents Incorporated by Reference	Certain information contained in the registrant’s proxy statement for its annual meeting of stockholders to be held July 31, 2020 is incorporated by reference in Part II – Item 5 and Part III of this Annual Report on Form 10-K.
Amendment Flag	false
Entity Central Index Key	0000772406
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--03-28