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, 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, including excise tax		(2,019)	(2,019)		(30)			1,989
Employee stock plans		126	126		72			(54)
Change in redemption value of redeemable noncontrolling interests		(482)	(482)			(482)
Other		(12)	0						(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, including excise tax		(1,513)	(1,513)		(225)			1,288
Employee stock plans		92	92		91			(1)
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
Beginning balance at Dec. 31, 2024		33,256	33,159	415	44,321	20,977	(883)	(31,671)	97
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	[1]	3,446	3,422			3,337	85		24
Dividends (Dividend declared per common share)		(894)	(880)			(880)			(14)
Share repurchases, including excise tax		(2,525)	(2,525)		(45)			2,480
Employee stock plans		103	103		76			(27)
Change in redemption value of redeemable noncontrolling interests		(146)	(146)			(146)
Other		(2)	0						(2)
Ending balance at Sep. 30, 2025		33,238	33,133	415	44,352	23,288	(798)	(34,124)	105
Beginning balance at Jun. 30, 2025		33,496	33,390	415	44,392	22,402	(795)	(33,024)	106
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	[1]	1,180	1,173			1,176	(3)		7
Dividends (Dividend declared per common share)		(295)	(291)			(291)			(4)
Share repurchases, including excise tax		(1,211)	(1,211)		(110)			1,101
Employee stock plans		71	71		70			(1)
Change in redemption value of redeemable noncontrolling interests		1	1			1
Other		(4)	0						(4)
Ending balance at Sep. 30, 2025		$ 33,238	$ 33,133	$ 415	$ 44,352	$ 23,288	$ (798)	$ (34,124)	$ 105

[1] 1Excludes comprehensive income of $82 million and $69 million for the three months ended September 30, 2025 and 2024, respectively, and $235 million and $208 million for the nine months ended September 30, 2025 and 2024, respectively, attributable to our redeemable noncontrolling interests.