Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2023	Mar. 14, 2024	Jun. 30, 2023
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2023
Document Transition Report	false
Entity File Number	033-44202
Entity Registrant Name	Fortitude Life Insurance & Annuity Company
Entity Incorporation, State or Country Code	AZ
Entity Tax Identification Number	06-1241288
Entity Address, Address Line One	Ten Exchange Place
Entity Address, Address Line Two	Suite 2210
Entity Address, City or Town	Jersey City
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	07302
City Area Code	(615
Local Phone Number	981-8801
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		25,000
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Entity Central Index Key	0000881453
Current Fiscal Year End Date	--12-31
Entity Public Float			$ 0