Commitments and Contingencies	9 Months Ended
Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Related Party Agreements In March of 2018, the Company made a $20 million contribution to the S&P Global Foundation. In June of 2012, we entered into a license agreement (the "License Agreement") with the holder of S&P Dow Jones Indices LLC noncontrolling interest, CME Group, which replaced the 2005 license agreement between Indices and CME Group. Under the terms of the License Agreement, S&P Dow Jones Indices LLC receives a share of the profits from the trading and clearing of CME Group's equity index products. During the three and nine months ended September 30, 2018, S&P Dow Jones Indices LLC earned $28 million and $82 million, respectively, of revenue under the terms of the License Agreement. During the three and nine months ended September 30, 2017, S&P Dow Jones Indices LLC earned $18 million and $56 million, respectively, of revenue under the terms of the License Agreement. The entire amount of this revenue is included in our consolidated statement of income and the portion related to the 27% noncontrolling interest is removed in net income attributable to noncontrolling interests. Legal and Regulatory Matters In the normal course of business both in the United States and abroad, the Company and its subsidiaries are defendants in a number of legal proceedings and are often the subject of government and regulatory proceedings, investigations and inquiries. Many of these proceedings, investigations and inquiries relate to the ratings activity of S&P Global Ratings brought by issuers and alleged purchasers of rated securities. In addition, various government and self-regulatory agencies frequently make inquiries and conduct investigations into our compliance with applicable laws and regulations, including those related to ratings activities and antitrust matters. For example, as a nationally recognized statistical rating organization registered with the SEC under Section 15E of the Securities Exchange Act of 1934, S&P Global Ratings is in ongoing communication with the staff of the SEC regarding compliance with its extensive obligations under the federal securities laws. Although S&P Global Ratings seeks to promptly address any compliance issues that it detects or that the staff of the SEC raises, there can be no assurance that the SEC will not seek remedies against S&P Global Ratings for one or more compliance deficiencies. Any of these proceedings, investigations or inquiries could ultimately result in adverse judgments, damages, fines, penalties or activity restrictions, which could adversely impact our consolidated financial condition, cash flows, business or competitive position. S&P Global Ratings In the second quarter the Company entered into an agreement to settle certain civil cases in Australia against the Company and certain of its subsidiaries relating to alleged investment losses in collateralized debt obligations rated by S&P Global Ratings. The settlement was approved by the court in August 2018.

Commitments and Contingencies

Related Party Agreements

In March of 2018, the Company made a $20 million contribution to the S&P Global Foundation.

In June of 2012, we entered into a license agreement (the "License Agreement") with the holder of S&P Dow Jones Indices LLC noncontrolling interest, CME Group, which replaced the 2005 license agreement between Indices and CME Group. Under the terms of the License Agreement, S&P Dow Jones Indices LLC receives a share of the profits from the trading and clearing of CME Group's equity index products. During the three and nine months ended September 30, 2018, S&P Dow Jones Indices LLC earned $28 million and $82 million, respectively, of revenue under the terms of the License Agreement. During the three and nine months ended September 30, 2017, S&P Dow Jones Indices LLC earned $18 million and $56 million, respectively, of revenue under the terms of the License Agreement. The entire amount of this revenue is included in our consolidated statement of income and the portion related to the 27% noncontrolling interest is removed in net income attributable to noncontrolling interests.

Legal and Regulatory Matters

In the normal course of business both in the United States and abroad, the Company and its subsidiaries are defendants in a number of legal proceedings and are often the subject of government and regulatory proceedings, investigations and inquiries. Many of these proceedings, investigations and inquiries relate to the ratings activity of S&P Global Ratings brought by issuers and alleged purchasers of rated securities. In addition, various government and self-regulatory agencies frequently make inquiries and conduct investigations into our compliance with applicable laws and regulations, including those related to ratings activities and antitrust matters. For example, as a nationally recognized statistical rating organization registered with the SEC under Section 15E of the Securities Exchange Act of 1934, S&P Global Ratings is in ongoing communication with the staff of the SEC regarding compliance with its extensive obligations under the federal securities laws. Although S&P Global Ratings seeks to promptly address any compliance issues that it detects or that the staff of the SEC raises, there can be no assurance that the SEC will not seek remedies against S&P Global Ratings for one or more compliance deficiencies. Any of these proceedings, investigations or inquiries could ultimately result in adverse judgments, damages, fines, penalties or activity restrictions, which could adversely impact our consolidated financial condition, cash flows, business or competitive position.

S&P Global Ratings

In the second quarter the Company entered into an agreement to settle certain civil cases in Australia against the Company and certain of its subsidiaries relating to alleged investment losses in collateralized debt obligations rated by S&P Global Ratings. The settlement was approved by the court in August 2018.