CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Income Statement [Abstract]
Revenue	$ 2,079	$ 1,924
Expenses
Operating	531	491
Selling, general and administrative	477	439
Depreciation and amortization	122	113
Restructuring	27	33
Charges related to asset abandonment	0	2
Total expenses	1,157	1,078
Operating income	922	846
Non-operating (expense) income, net
Interest expense, net	(66)	(61)
Other non-operating income, net	14	19
Total non-operating (expense) income, net	(52)	(42)
Income before provision for income taxes	870	804
Provision for income taxes	209	179
Net income attributable to Moody's	$ 661	$ 625
Earnings per share attributable to Moody's common shareholders
Basic (in usd per share)	$ 3.74	$ 3.47
Diluted (in usd per share)	$ 3.73	$ 3.46
Weighted average number of shares outstanding
Basic (in shares)	176.8	180.0
Diluted (in shares)	177.3	180.7