Consolidated Statements of Equity (Unaudited) - 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, 2020		$ 571		$ 509		$ 294	$ 946	$ 13,367		$ (637)		$ (13,461)	$ 62
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	[1]	1,436		1,426				1,553		(127)			10
Dividends (Dividend declared per common share)		(378)		(371)				(371)					(7)
Employee stock plans		13		13			17					4
Change in redemption value of redeemable noncontrolling interest		(312)		(312)				(312)
Other		1											1
Ending Balance at Jun. 30, 2021		1,331		1,265		294	963	14,237		(764)		(13,465)	66
Beginning Balance at Mar. 31, 2021		1,098		1,032		294	935	13,920		(648)		(13,469)	66
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	[1]	690		682				798		(116)			8
Dividends (Dividend declared per common share)		(192)		(185)				(185)					(7)
Employee stock plans		32		32			28					(4)
Change in redemption value of redeemable noncontrolling interest		(296)		(296)				(296)
Other		(1)											(1)
Ending Balance at Jun. 30, 2021		1,331		1,265		294	963	14,237		(764)		(13,465)	66
Beginning Balance at Dec. 31, 2021		2,107		2,032		294	1,031	15,017		(841)		(13,469)	75
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income		2,249	[1]	2,237	[1]			2,207		30	[1]		12	[1]
Dividends (Dividend declared per common share)		(482)		(472)				(472)					(10)
Acquisition of IHS Markit		43,536		43,536		121	43,415
Share repurchases		(8,503)		(8,503)			(1,275)					7,228
Employee stock plans		57		57			71					14
Change in redemption value of redeemable noncontrolling interest		547		547				547
Other		(5)		(1)				(1)					(4)
Ending Balance at Jun. 30, 2022		39,506		39,433		415	43,242	17,298		(811)		(20,711)	73
Beginning Balance at Mar. 31, 2022		39,781		39,702		415	43,445	16,065		(782)		(19,441)	79
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income		950	[1]	943	[1]			972	[1]	(29)			7
Dividends (Dividend declared per common share)		(296)		(286)				(286)					(10)
Share repurchases		(1,500)		(1,500)			(225)					1,275
Employee stock plans		27		27			22					(5)
Change in redemption value of redeemable noncontrolling interest		548		548				548
Other		(4)		(1)				(1)					(3)
Ending Balance at Jun. 30, 2022		$ 39,506		$ 39,433		$ 415	$ 43,242	$ 17,298		$ (811)		$ (20,711)	$ 73

[1] Excludes comprehensive income of $72 million and $51 million for the three months ended June 30, 2022 and 2021, respectively, and $131 million and $103 million for the six months ended June 30, 2022 and 2021, respectively, attributable to our redeemable noncontrolling interest.