CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY - USD ($) $ in Millions	Total	Total Moody’s Shareholders’ Equity	Common Stock	Capital Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss	Non- Controlling Interests
Common stock, shares, issued, beginning balance (in shares) at Dec. 31, 2022			342,900,000
Treasury stock, common, shares, beginning balance (in shares) at Dec. 31, 2022						(159,700,000)
Beginning Balance at Dec. 31, 2022	$ 2,689	$ 2,519	$ 3	$ 1,054	$ 13,618	$ (11,513)	$ (643)	$ 170
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,608	1,607			1,607			1
Dividends	(575)	(566)			(566)			(9)
Stock-based compensation	193	193		193
Shares issued for stock-based compensation plans at average cost, net	(19)	(19)		(19)		$ 0
Shares issued for stock-based compensation plans at average cost, net (in shares)						800,000
Treasury shares repurchased, inclusive of excise tax	(492)	(492)		0		$ (492)
Treasury shares repurchased (in shares)						(1,500,000)
Currency translation adjustment, net of net investment hedge activity	80	84					84	(4)
Net actuarial gains (losses) and prior service cost	(6)	(6)					(6)
Amortization of prior service costs/ actuarial losses and settlement charge	(3)	(3)					(3)
Net realized and unrealized gain (loss) on cash flow hedges	1	1					1
Common stock, shares, issued, ending balance (in shares) at Dec. 31, 2023			342,900,000
Treasury stock, common, shares, ending balance (in shares) at Dec. 31, 2023						(160,400,000)
Ending Balance at Dec. 31, 2023	3,476	3,318	$ 3	1,228	14,659	$ (12,005)	(567)	158
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,059	2,058			2,058			1
Dividends	(653)	(646)			(646)			(7)
Stock-based compensation	225	225		225
Shares issued for stock-based compensation plans at average cost, net	(18)	(18)		(2)		$ (16)
Shares issued for stock-based compensation plans at average cost, net (in shares)						700,000
Noncontrolling interest resulting from majority acquisition	10	0						10
Treasury shares repurchased, inclusive of excise tax	(1,301)	(1,301)		0		$ (1,301)
Treasury shares repurchased (in shares)						(2,900,000)
Currency translation adjustment, net of net investment hedge activity	(90)	(90)					(90)	0
Net actuarial gains (losses) and prior service cost	19	19					19
Amortization of prior service costs/ actuarial losses and settlement charge	(2)	(2)					(2)
Net realized and unrealized gain (loss) on cash flow hedges	$ 2	2					2
Common stock, shares, issued, ending balance (in shares) at Dec. 31, 2024			342,900,000
Treasury stock, common, shares, ending balance (in shares) at Dec. 31, 2024	(162,593,213)					(162,600,000)
Ending Balance at Dec. 31, 2024	$ 3,727	3,565	$ 3	1,451	16,071	$ (13,322)	(638)	162
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,462	2,459			2,459			3
Dividends	(682)	(677)			(677)			(5)
Stock-based compensation	239	239		239
Shares issued for stock-based compensation plans at average cost, net	(50)	(50)		(14)		$ (36)
Shares issued for stock-based compensation plans at average cost, net (in shares)						500,000
Treasury shares repurchased, inclusive of excise tax	(1,620)	(1,620)		0		$ (1,620)
Treasury shares repurchased (in shares)						(3,300,000)
Currency translation adjustment, net of net investment hedge activity	123	132					132	(9)
Net actuarial gains (losses) and prior service cost	7	7					7
Amortization of prior service costs/ actuarial losses and settlement charge	(2)	(2)					(2)
Net realized and unrealized gain (loss) on cash flow hedges	$ 1	1					1
Common stock, shares, issued, ending balance (in shares) at Dec. 31, 2025			342,900,000
Treasury stock, common, shares, ending balance (in shares) at Dec. 31, 2025	(165,359,285)					(165,400,000)
Ending Balance at Dec. 31, 2025	$ 4,205	$ 4,054	$ 3	$ 1,676	$ 17,853	$ (14,978)	$ (500)	$ 151