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Nature of Operations and Basis of Presentation (Details) $ in Billions | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Feb. 29, 2016 business | Mar. 31, 2016 Segment | Apr. 30, 2016 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |
Number of reportable segments (in segments) | Segment |  | 4 |
J.D. Power | C&C | Disposal Group, Held-for-sale, Not Discontinued Operations | Subsequent Event |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Consideration for sale of business | $ |  |  | $ 1.1
SPSE and CMA | S&P Global Market Intelligence | Disposal Group, Held-for-sale, Not Discontinued Operations |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Number of businesses to be sold | business | 2 |  |

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