Commitments and Contingencies (Details Textual)	12 Months Ended				12 Months Ended		0 Months Ended			1 Months Ended		0 Months Ended			1 Months Ended	12 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2003 USD ($)	Dec. 01, 2013 USD ($)	Dec. 31, 2013 S&P/DJ Indices [Member] USD ($)	Dec. 31, 2012 S&P/DJ Indices [Member] USD ($)	Dec. 03, 2012 Parmalat [Member] USD ($)	Jun. 29, 2012 Parmalat [Member] USD ($)	Jun. 29, 2012 Parmalat [Member] EUR (€)	Jun. 30, 2006 Parmalat [Member] analysts	Dec. 31, 2003 Parmalat [Member] EUR (€)	Sep. 14, 2010 Reed Construction Data, Inc. v. The McGraw-Hill Companies [Member] claims	Jan. 22, 2012 Reed Construction Data, Inc. v. The McGraw-Hill Companies [Member] claims	Oct. 08, 2009 Reed Construction Data, Inc. v. The McGraw-Hill Companies [Member] claims	Feb. 07, 2014 Subsequent Event [Member] Italian Administrative Court [Member] EUR (€)	Dec. 31, 2013 Selling, General and Administrative Expenses [Member] Subprime Litigation Cases [Member] USD ($)	Dec. 31, 2012 S&P Dow Jones LLC [Member]	Dec. 31, 2012 S&P Dow Jones LLC [Member] CME Group and CGIS [Member]
Loss Contingencies [Line Items]
Sale of equity investment in Rock-McGraw, Inc., percentage			45.00%
Percentage of leased building space, company	17.00%
Proceeds from the disposition of equity investment in Rock-McGraw			$ 382,000,000
Pre-tax gain from Sale of equity investment in Rock-McGraw			131,000,000
After-tax gain from Sale of equity investment in Rock-McGraw			58,000,000
Pre-tax gain pursuant to sale-leaseback accounting rules			212,000,000
After-tax gain pursuant to sale-leaseback accounting rules			126,000,000
Deferred gain	45,000,000			60,000,000
Gain amortized during year		15,000,000
Interest expense with operating lease	5,000,000
Revenue from related parties					46,000,000	21,000,000
Percentage of interest in joint venture																	73.00%	27.00%
Damages claimed											4,073,984,120
Rating fees paid								1,100,000	784,000
Reimbursement of trial costs								100,000	47,390
Fees paid to court appointed experts to be reimbursed								100,000	67,797
Payment of judgment							1,103,793									77,000,000
Number of analysts served notice of completion										8
Damages sought															€ 234,000,000,000
Number of claims motioned to be dismissed												5	5	5
Number of claims filed													11	11
Number of claims dismissed												3