Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Revenue	$ 1,453	$ 1,341
Expenses:
Operating-related expenses	411	453
Selling and general expenses	351	334
Depreciation	19	18
Amortization of intangibles	24	24
Total expenses	805	829
Operating profit	648	512
Interest expense, net	37	40
Income before taxes on income	611	472
Provision for taxes on income	181	149
Net income	430	323
Less: net income attributable to noncontrolling interests	(31)	(29)
Net income attributable to S&P Global Inc.	$ 399	$ 294
Net income:
Basic (in dollars per share)	$ 1.54	$ 1.11
Diluted (in dollars per share)	$ 1.53	$ 1.10
Weighted-average number of common shares outstanding:
Basic (in shares)	258.2	265.0
Diluted (in shares)	260.8	267.2
Actual shares outstanding at period end (in shares)	257.8	264.5
Dividend declared per common share (in dollars per share)	$ 0.41	$ 0.36