Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 1,299	$ 808
Other comprehensive income:
Foreign currency translation adjustments	(21)	(25)
Income tax effect	(5)	(5)
Foreign currency translation adjustment, net of income tax effect	(26)	(30)
Pension and other postretirement benefit plans	5	21
Income tax effect	(1)	(4)
Pension and other postretirement benefit plans, net of income tax effect	4	17
Unrealized gain on cash flow hedges	107	2
Income tax effect	(26)	0
Unrealized gain on investment and forward exchange contracts, net of income tax effect	81	2
Comprehensive income	1,358	797
Less: comprehensive income attributable to nonredeemable noncontrolling interests	(5)	(2)
Less: comprehensive income attributable to redeemable noncontrolling interests	(59)	(51)
Comprehensive income attributable to S&P Global Inc.	$ 1,294	$ 744