Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 3,263	$ 2,534	$ 2,303
Other comprehensive income:
Foreign currency translation adjustments	11	(24)	10
Income tax effect	(24)	22	8
Foreign currency translation adjustment, net of income tax effect	(13)	(2)	18
Pension and other postretirement benefit plans	33	(31)	141
Income tax effect	(10)	8	(39)
Pension and other postretirement benefit plans, net of income tax effect	23	(23)	102
Unrealized (loss) gain on cash flow hedges	(282)	17	(2)
Income tax effect	68	(5)	0
Unrealized loss on investment and forward exchange contracts, net of income tax effect	(214)	12	(2)
Comprehensive income	3,059	2,521	2,421
Less: comprehensive income attributable to nonredeemable noncontrolling interests	(24)	(14)	(10)
Less: comprehensive income attributable to redeemable noncontrolling interests	(215)	(181)	(170)
Comprehensive income attributable to S&P Global Inc.	$ 2,820	$ 2,326	$ 2,241