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Acquisitions and Divestitures (Acquisitions) (Details Textual) company in Thousands, shares in Millions, $ in Millions |  |  | 1 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2012 USD ($) | Jun. 29, 2012 USD ($) | Mar. 31, 2014 country company | Aug. 31, 2013 USD ($) shares | Jun. 30, 2013 | Jun. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Dec. 31, 2003
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Acquisitions, including contingent payments, net of cash acquired |  |  |  |  |  | $ 2 | $ 16 | $ 71 | $ 47 | $ 177 |
Acquisitions, net of cash acquired |  |  |  |  |  |  |  | 82 | 273 |  |
Minimum number of companies represented in broad market indices | company |  |  | 11 |  |  |  |  |  |  |  |
Minimum number of countries represented in broad market indices | country |  |  | 52 |  |  |  |  |  |  |  |
Payments for previous acquisition |  |  |  |  |  |  |  | $ 11 |  |  |
Amortization period for intangible assets |  |  |  |  |  |  |  | 5 years |  |  |
Ownership percentage |  |  |  |  |  |  |  |  |  |  | 45.00%
Fair value of business acquired |  | $ 792 |  |  |  |  |  | $ 0 | 0 | $ 792 |
Deferred tax liabilities, noncurrent |  |  |  |  |  | $ 87 |  | $ 56 | $ 206 |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Amortization period of intangible assets (in years) |  |  |  |  |  |  |  |  |  | 5 years |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Amortization period for intangible assets |  |  |  |  |  |  |  | 7 years |  |  |
Amortization period of intangible assets (in years) |  |  |  |  |  |  |  |  | 20 years | 20 years |
DJI [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fair value of business acquired | $ 792 |  |  |  |  |  |  |  |  |  |
Deferred tax liabilities, noncurrent |  | $ 216 |  |  |  |  |  |  |  |  |
DJI [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fair value estimates of proportionate shares of contributed businesses, assumptions, discount rates |  | 10.00% |  |  |  |  |  |  |  |  |
Fair value estimates of proportionate shares of contributed businesses, assumptions, long term growth rates |  | 2.50% |  |  |  |  |  |  |  |  |
DJI [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fair value estimates of proportionate shares of contributed businesses, assumptions, discount rates |  | 11.00% |  |  |  |  |  |  |  |  |
Fair value estimates of proportionate shares of contributed businesses, assumptions, long term growth rates |  | 3.50% |  |  |  |  |  |  |  |  |
S&P Dow Jones LLC [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of interest in joint venture |  |  |  |  |  |  |  |  |  | 73.00% |
S&P/DJ Indices [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Acquisition-related costs |  |  |  |  |  |  |  |  | $ 15 |  |
CRISIL Limited [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Offer to purchase additional equity percent |  |  |  |  | 22.23% |  |  |  |  |  |
Shares acquired | shares |  |  |  | 11 |  |  |  |  |  |  |
Percent of total shares acquired |  |  |  | 15.07% |  |  |  |  |  |  |
Consideration for shares |  |  |  | $ 214 |  |  |  |  |  |  |
Ownership percentage |  |  |  | 67.84% | 52.77% |  |  |  |  |  |
Contingent purchase price payment |  |  |  |  |  |  |  |  | $ 12 |  |
CME Group [Member] | S&P/DJ Indices [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest ownership by noncontrolling owners | 27.00% |  |  |  |  | 27.00% |  |  |  |  |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e1043-128460 + Details
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