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Document and Entity Information
Aug. 05, 2024
Entity Information [Line Items]  
Document Type 8-K
Document Period End Date Aug. 05, 2024
Entity Registrant Name MOODY’S CORPORATION
Entity Incorporation State Country Code DE
Entity File Number 1-14037
Entity Tax Identification Number 13-3998945
Entity Address Address Line 1 7 World Trade Center at 250 Greenwich Street
Entity Address City Or Town New York
Entity Address State Or Province NY
Entity Address Postal Zip Code 10007
City Area Code 212
Local Phone Number 553-0300
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Entity Central Index Key 0001059556
Amendment Flag false
Common Stock, par value $0.01 per share [Member]  
Entity Information [Line Items]  
Security 12b Title Common Stock, par value $0.01 per share
Trading Symbol MCO
Security Exchange Name NYSE
1.75% Senior Notes Due 2027 [Member]  
Entity Information [Line Items]  
Security 12b Title 1.75% Senior Notes Due 2027
Trading Symbol MCO 27
Security Exchange Name NYSE
.950% Senior Notes Due Two Thousand and Thirty [Member]  
Entity Information [Line Items]  
Security 12b Title 0.950% Senior Notes Due 2030
Trading Symbol MCO 30
Security Exchange Name NYSE