Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Revenue	$ 3,101	$ 2,993	$ 6,261	$ 5,383
Expenses:
Operating-related expenses	1,026	1,007	2,114	1,756
Selling and general expenses	771	768	1,476	1,726
Depreciation	24	36	49	62
Amortization of intangibles	261	267	522	379
Total expenses	2,082	2,078	4,161	3,923
Loss (gain) on dispositions	119	(556)	69	(1,899)
Equity in income on unconsolidated subsidiaries	(11)	(11)	(25)	(15)
Operating profit	911	1,482	2,056	3,374
Other income, net	(11)	(1)	0	(50)
Interest expense, net	88	90	174	147
Loss on extinguishment of debt, net	0	2	0	19
Income before taxes on income	834	1,391	1,882	3,258
Provision for taxes on income	259	340	447	908
Net income	575	1,051	1,435	2,350
Less: net income attributable to noncontrolling interests	(64)	(79)	(130)	(143)
Net income attributable to S&P Global Inc.	$ 511	$ 972	$ 1,305	$ 2,207
Earnings per share attributable to S&P Global Inc. common shareholders:
Basic (USD per share)	$ 1.60	$ 2.87	$ 4.08	$ 7.19
Diluted (USD per share)	$ 1.60	$ 2.86	$ 4.07	$ 7.17
Weighted-average number of common shares outstanding:
Basic (shares)	319.3	338.0	320.3	306.8
Diluted (shares)	319.8	339.3	320.9	308.0
Actual shares outstanding at period end (shares)	318.2	336.2	318.2	336.2