Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 412	$ 381	$ 735	$ 711
Other comprehensive income:
Foreign currency translation adjustment	(54)	50	(40)	(32)
Income tax effect	(1)	(2)	(1)	(2)
Foreign currency translation adjustment, net of income tax effect	(55)	48	(41)	(34)
Pension and other postretirement benefit plans	12	51	16	55
Income tax effect	(3)	(16)	(4)	(18)
Pension and other post-retirement benefit plans, net of income tax effect	9	35	12	37
Unrealized gain on forward exchange contracts	(1)	(1)	3	0
Income tax effect	0	0	(1)	0
Unrealized gain (loss) on forward exchange contracts, net of income tax effect	(1)	(1)	2	0
Comprehensive income	365	463	708	714
Less: comprehensive income attributable to nonredeemable noncontrolling interests	(2)	(4)	(5)	(5)
Less: comprehensive income attributable to redeemable noncontrolling interests	(27)	(24)	(53)	(50)
Comprehensive income attributable to S&P Global Inc.	$ 336	$ 435	$ 650	$ 659