Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Revenue	$ 3,084	$ 2,861	$ 9,345	$ 8,244
Expenses:
Operating-related expenses	995	989	3,109	2,745
Selling and general expenses	741	725	2,217	2,451
Depreciation	22	31	71	93
Amortization of intangibles	260	267	782	645
Total expenses	2,018	2,012	6,179	5,934
Loss (gain) on dispositions	0	2	69	(1,897)
Equity in income on unconsolidated subsidiaries	(8)	(6)	(33)	(21)
Operating profit	1,074	853	3,130	4,228
Other income, net	(5)	(37)	(5)	(86)
Interest expense, net	84	71	258	218
(Gain) loss on extinguishment of debt, net	0	(4)	0	15
Income before taxes on income	995	823	2,877	4,081
Provision for taxes on income	181	145	628	1,053
Net income	814	678	2,249	3,028
Less: net income attributable to noncontrolling interests	(72)	(70)	(202)	(213)
Net income attributable to S&P Global Inc.	$ 742	$ 608	$ 2,047	$ 2,815
Earnings per share attributable to S&P Global Inc. common shareholders:
Basic (USD per share)	$ 2.34	$ 1.84	$ 6.41	$ 8.95
Diluted (USD per share)	$ 2.33	$ 1.84	$ 6.40	$ 8.91
Weighted-average number of common shares outstanding:
Basic (shares)	317.5	329.6	319.4	314.5
Diluted (shares)	318.0	330.9	319.9	315.7
Actual shares outstanding at period end (shares)	316.8	325.8	316.8	325.8