Document And Entity Information
Feb. 21, 2024
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Feb. 21, 2024
Entity Registrant Name Alight, Inc. / Delaware
Entity Central Index Key 0001809104
Entity Emerging Growth Company false
Entity File Number 001-39299
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 86-1849232
Entity Address, Address Line One 4 Overlook Point
Entity Address, City or Town Lincolnshire
Entity Address, State or Province IL
Entity Address, Postal Zip Code 60069
City Area Code (224)
Local Phone Number 737-7000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Class A Common Stock, par value $0.0001 per share
Trading Symbol ALIT
Security Exchange Name NYSE