Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Revenue	$ 8,297	$ 7,442	$ 6,699
Expenses:
Operating-related expenses	2,195	2,094	1,976
Selling and general expenses	1,714	1,541	1,342
Depreciation	82	83	82
Amortization of intangibles	96	123	122
Total expenses	4,087	3,841	3,522
Gain on dispositions	(11)	(16)	(49)
Operating profit	4,221	3,617	3,226
Other (income) expense, net	(62)	(31)	98
Interest expense, net	119	141	141
Loss on extinguishment of debt	0	279	57
Income before taxes on income	4,164	3,228	2,930
Provision for taxes on income	901	694	627
Net income	3,263	2,534	2,303
Less: net income attributable to noncontrolling interests	(239)	(195)	(180)
Net income attributable to S&P Global Inc.	$ 3,024	$ 2,339	$ 2,123
Net income:
Basic (USD per share)	$ 12.56	$ 9.71	$ 8.65
Diluted (USD per share)	$ 12.51	$ 9.66	$ 8.60
Weighted-average number of common shares outstanding:
Basic (shares)	240.8	241.0	245.4
Diluted (shares)	241.8	242.1	246.9
Actual shares outstanding at year end (shares)	241.0	240.6	244.0