Condensed Consolidating Financial Statements (Statement of Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Condensed Income Statements, Captions [Line Items]
Revenue	$ 1,482	$ 1,342	$ 2,823	$ 2,615
Expenses:
Operating-related expenses	469	412	926	823
Selling and general expenses	317	326	647	654
Depreciation	22	22	40	43
Amortization of intangibles	23	11	47	23
Total expenses	831	771	1,660	1,543
Other income	0	(11)	0	(11)
Operating profit	651	582	1,163	1,083
Interest expense, net	42	16	83	32
Non-operating intercompany transactions	0	0	0	0
Income before taxes on income	609	566	1,080	1,051
Provision for taxes on income	197	185	345	340
Equity in net income (loss) income of subsidiaries	0	0	0	0
Net income	412	381	735	711
Less: net income attributable to noncontrolling interests	(29)	(28)	(58)	(55)
Net income	383	353	677	656
Comprehensive income	365	463	708	714
Eliminations
Condensed Income Statements, Captions [Line Items]
Revenue	(32)	(28)	(62)	(56)
Expenses:
Operating-related expenses	(32)	(28)	(62)	(56)
Selling and general expenses	0	0	0	0
Depreciation	0	0	0	0
Amortization of intangibles	0	0	0	0
Total expenses	(32)	(28)	(62)	(56)
Other income		0		0
Operating profit	0	0	0	0
Interest expense, net	0	0	0	0
Non-operating intercompany transactions	141	0	570	0
Income before taxes on income	(141)	0	(570)	0
Provision for taxes on income	0	0	0	0
Equity in net income (loss) income of subsidiaries	(689)	(406)	(1,552)	(837)
Net income	(830)	(406)	(2,122)	(837)
Less: net income attributable to noncontrolling interests	(29)	(28)	(58)	(55)
Net income	(859)	(434)	(2,180)	(892)
Comprehensive income	(850)	(405)	(2,140)	(839)
S&P Global Inc.
Condensed Income Statements, Captions [Line Items]
Revenue	171	161	342	317
Expenses:
Operating-related expenses	26	21	52	53
Selling and general expenses	33	1	51	67
Depreciation	10	10	19	19
Amortization of intangibles	0	1	0	2
Total expenses	69	33	122	141
Other income		0		0
Operating profit	102	128	220	176
Interest expense, net	44	20	86	37
Non-operating intercompany transactions	95	71	169	129
Income before taxes on income	(37)	37	(35)	10
Provision for taxes on income	(17)	11	(18)	17
Equity in net income (loss) income of subsidiaries	617	338	1,408	703
Net income	597	364	1,391	696
Less: net income attributable to noncontrolling interests	0	0	0	0
Net income	597	364	1,391	696
Comprehensive income	545	384	1,347	710
Standard & Poor's Financial Services LLC
Condensed Income Statements, Captions [Line Items]
Revenue	413	573	754	1,117
Expenses:
Operating-related expenses	93	154	231	311
Selling and general expenses	62	101	97	162
Depreciation	2	5	5	10
Amortization of intangibles	0	0	0	0
Total expenses	157	260	333	483
Other income		0		0
Operating profit	256	313	421	634
Interest expense, net	0	0	0	0
Non-operating intercompany transactions	(37)	59	(42)	91
Income before taxes on income	293	254	463	543
Provision for taxes on income	111	99	167	190
Equity in net income (loss) income of subsidiaries	72	68	144	134
Net income	254	223	440	487
Less: net income attributable to noncontrolling interests	0	0	0	0
Net income	254	223	440	487
Comprehensive income	261	222	446	486
Non-Guarantor Subsidiaries
Condensed Income Statements, Captions [Line Items]
Revenue	930	636	1,789	1,237
Expenses:
Operating-related expenses	382	265	705	515
Selling and general expenses	222	224	499	425
Depreciation	10	7	16	14
Amortization of intangibles	23	10	47	21
Total expenses	637	506	1,267	975
Other income		(11)		(11)
Operating profit	293	141	522	273
Interest expense, net	(2)	(4)	(3)	(5)
Non-operating intercompany transactions	(199)	(130)	(697)	(220)
Income before taxes on income	494	275	1,222	498
Provision for taxes on income	103	75	196	133
Equity in net income (loss) income of subsidiaries	0	0	0	0
Net income	391	200	1,026	365
Less: net income attributable to noncontrolling interests	0	0	0	0
Net income	391	200	1,026	365
Comprehensive income	$ 409	$ 262	$ 1,055	$ 357