Goodwill and Other Intangible Assets (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Indefinite-lived Intangible Assets by Major Class [Line Items]
Carrying value of trade name and licenses	$ 634	$ 164
Finite-Lived Intangible Assets, Useful Life Maximum	11 years
Maximum [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Finite-Lived Intangible Assets, Useful Life Maximum	40 years
Dow Jones Index [Member] | Intellectual Property [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Carrying value of trade name and licenses	380
Dow Jones Index [Member] | Trade Names [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Carrying value of trade name and licenses	90
C&C [Member] | Trade Names [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Carrying value of trade name and licenses	$ 164