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, 2020				342,900,000
Treasury stock, common, shares, beginning balance (in shares) at Dec. 31, 2020							(155,800,000)
Beginning Balance at Dec. 31, 2020		$ 1,763	$ 1,569	$ 3	$ 735	$ 11,011	$ (9,748)	$ (432)	$ 194
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		2,214	2,214			2,214			0
Dividends		(466)	(463)			(463)			(3)
Stock-based compensation		175	175		175
Shares issued for stock-based compensation plans at average cost, net		(40)	(40)		(25)		$ (15)
Shares issued for stock-based compensation plans at average cost, net (in shares)							700,000
Treasury shares repurchased		(750)	(750)		0		$ (750)
Treasury shares repurchased (in shares)							(2,200,000)
Currency translation adjustment, net of net investment hedge activity		(51)	(49)					(49)	(2)
Net actuarial gains (losses) and prior service cost		55	55					55
Amortization of prior service costs/ actuarial losses and settlement charge		14	14					14
Net realized and unrealized gain (loss) on cash flow hedges		2	2					2
Common stock, shares, issued, ending balance (in shares) at Dec. 31, 2021				342,900,000
Treasury stock, common, shares, ending balance (in shares) at Dec. 31, 2021							(157,300,000)
Ending Balance at Dec. 31, 2021		2,916	2,727	$ 3	885	12,762	$ (10,513)	(410)	189
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		1,374	1,374			1,374			0
Dividends		(521)	(518)			(518)			(3)
Stock-based compensation		169	169		169
Shares issued for stock-based compensation plans at average cost, net		(61)	(61)		(32)		$ (29)
Shares issued for stock-based compensation plans at average cost, net (in shares)							600,000
Shares issued as consideration to acquire kompany (in shares)	[1]						100,000
Shares issued as consideration to acquire kompany	[1]	44	44		35		$ 9
Treasury shares repurchased		(983)	(983)		(3)		$ (980)
Treasury shares repurchased (in shares)							(3,100,000)
Currency translation adjustment, net of net investment hedge activity		(253)	(237)					(237)	(16)
Net actuarial gains (losses) and prior service cost		0
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, 2022		342,902,272		342,900,000
Treasury stock, common, shares, ending balance (in shares) at Dec. 31, 2022		(159,702,362)					(159,700,000)
Ending 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		(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		342,902,272		342,900,000
Treasury stock, common, shares, ending balance (in shares) at Dec. 31, 2023		(160,430,754)					(160,400,000)
Ending Balance at Dec. 31, 2023		$ 3,476	$ 3,318	$ 3	$ 1,228	$ 14,659	$ (12,005)	$ (567)	$ 158

[1] Represents a non-cash investing activity relating to the issuance of common stock to fund a portion of the purchase price for kompany.MOODY