CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Statement [Abstract]
Revenue	$ 7,718	$ 7,088	$ 5,916
Expenses
Operating	1,973	1,945	1,687
Selling, general and administrative	1,803	1,735	1,632
Depreciation and amortization	480	431	373
Restructuring	108	59	87
Charges related to asset abandonment	3	43	0
Total expenses	4,367	4,213	3,779
Operating income	3,351	2,875	2,137
Non-operating expense, net
Interest expense, net	(213)	(237)	(251)
Other non-operating (expense) income, net	(31)	61	49
Gain on divestiture of business	23	0	0
Non-operating expense, net	(221)	(176)	(202)
Income before provision for income taxes	3,130	2,699	1,935
Provision for income taxes	668	640	327
Net income	2,462	2,059	1,608
Less: Net income attributable to noncontrolling interests	3	1	1
Net income attributable to Moody’s	$ 2,459	$ 2,058	$ 1,607
Earnings per share
Basic (in USD per share)	$ 13.73	$ 11.32	$ 8.77
Diluted (in USD per share)	$ 13.67	$ 11.26	$ 8.73
Weighted average shares outstanding
Basic (in shares)	179.1	181.8	183.2
Diluted (in shares)	179.9	182.7	184.0