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Segment and Related Information (Operating Results by Segment) (Details) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2016 USD ($) Segment | Mar. 31, 2015 USD ($)
Segment Reporting [Abstract] |  |
Number of reportable segments (in segments) | Segment | 4 |
Segment Reporting Information [Line Items] |  |
Revenue | $ 1,341 | $ 1,273
Operating Profit | 512 | 501
Amortization of intangible assets | 24 | 11
S&P Ratings |  |
Segment Reporting Information [Line Items] |  |
Revenue | 552 | 606
Operating Profit | 262 | 291
Insurance recoveries | 15 | 35
Legal settlement charge | 3 | 29
Amortization of intangible assets | 1 | 1
S&P Global Market Intelligence |  |
Segment Reporting Information [Line Items] |  |
Revenue | 407 | 320
Operating Profit | 81 | 63
Amortization of intangible assets | 19 | 6
Impairment of intangible asset | 24 |
S&P DJ Indices |  |
Segment Reporting Information [Line Items] |  |
Revenue | 151 | 143
Operating Profit | 101 | 95
Amortization of intangible assets | 1 | 1
C&C |  |
Segment Reporting Information [Line Items] |  |
Revenue | 254 | 225
Operating Profit | 102 | 85
Amortization of intangible assets | 3 | 3
Disposition-related cost | 3 |
Intersegment elimination |  |
Segment Reporting Information [Line Items] |  |
Revenue | (23) | (21)
Operating Profit | 0 | 0
Total operating segments |  |
Segment Reporting Information [Line Items] |  |
Revenue | 1,341 | 1,273
Operating Profit | 546 | 534
Unallocated expense |  |
Segment Reporting Information [Line Items] |  |
Revenue | 0 | 0
Operating Profit | $ (34) | $ (33)

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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