Consolidated Statements of Equity - USD ($) $ in Millions		Total	Total SPGI Equity	Common Stock $1 par	Additional Paid-in Capital	Retained Income	Accumulated Other Comprehensive Loss	Less: Treasury Stock	Noncontrolling Interests
Beginning Balance at Dec. 31, 2022		$ 36,477	$ 36,388	$ 415	$ 44,422	$ 17,784	$ (886)	$ (25,347)	$ 89
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	[1]	2,106	2,087			2,047	40		19
Dividends (Dividend declared per common share)		(875)	(864)			(864)			(11)
Share repurchases		(2,001)	(2,001)		125			2,126
Employee stock plans		53	53		(106)			(159)
Change in redemption value of redeemable noncontrolling interests		(247)	(247)			(247)
Adjustment to noncontrolling interest		(2)	(2)		(2)
Other		3	5			5			(2)
Ending Balance at Sep. 30, 2023		35,514	35,419	415	44,439	18,725	(846)	(27,314)	95
Beginning Balance at Jun. 30, 2023		35,559	35,468	415	44,293	18,279	(813)	(26,706)	91
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	[1]	716	709			742	(33)		7
Dividends (Dividend declared per common share)		(288)	(286)			(286)			(2)
Share repurchases		(500)	(500)		125			625
Employee stock plans		38	38		21			(17)
Change in redemption value of redeemable noncontrolling interests		(10)	(10)			(10)
Other		(1)							(1)
Ending Balance at Sep. 30, 2023		35,514	35,419	415	44,439	18,725	(846)	(27,314)	95
Beginning Balance at Dec. 31, 2023		34,300	34,200	415	44,231	18,728	(763)	(28,411)	100
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	[1]	3,041	3,021			2,972	49		20
Dividends (Dividend declared per common share)		(868)	(854)			(854)			(14)
Share repurchases		(2,001)	(2,001)		(30)			1,971
Employee stock plans		108	108		72			(36)
Change in redemption value of redeemable noncontrolling interests		(482)	(482)			(482)
Other		(12)							(12)
Ending Balance at Sep. 30, 2024		34,086	33,992	415	44,273	20,364	(714)	(30,346)	94
Beginning Balance at Jun. 30, 2024		34,970	34,881	415	44,407	19,957	(839)	(29,059)	89
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	[1]	1,103	1,096			971	125		7
Dividends (Dividend declared per common share)		(285)	(283)			(283)			(2)
Share repurchases		(1,501)	(1,501)		(225)			1,276
Employee stock plans		80	80		91			11
Change in redemption value of redeemable noncontrolling interests		(281)	(281)			(281)
Ending Balance at Sep. 30, 2024		$ 34,086	$ 33,992	$ 415	$ 44,273	$ 20,364	$ (714)	$ (30,346)	$ 94

[1] 1Excludes comprehensive income of $69 million and $65 million for the three months ended September 30, 2024 and 2023, respectively, and $208 million and $183 million for the nine months ended September 30, 2024 and 2023, respectively, attributable to our redeemable noncontrolling interests.