Goodwill and Other Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Goodwill
Goodwill, Beginning Balance	$ 1,104	$ 943
Additions, net	325	159
Transfers/reorganizations	3
Other ( primarily Fx )	6	2
Goodwill, Ending Balance	1,438	1,104
S&P Ratings
Goodwill
Goodwill, Beginning Balance	197	191
Additions, net	29	0
Transfers/reorganizations	(95)
Other ( primarily Fx )	(1)	6
Goodwill, Ending Balance	130	197
S&P Capital IQ
Goodwill
Goodwill, Beginning Balance	238	240
Additions, net	164	0
Transfers/reorganizations	53
Other ( primarily Fx )	2	(2)
Goodwill, Ending Balance	457	238
S&P DJ Indices
Goodwill
Goodwill, Beginning Balance	223	223
Additions, net	111	0
Transfers/reorganizations	45
Other ( primarily Fx )	1	0
Goodwill, Ending Balance	380	223
C&C
Goodwill
Goodwill, Beginning Balance	446	289
Additions, net	21	159
Transfers/reorganizations	0
Other ( primarily Fx )	4	(2)
Goodwill, Ending Balance	$ 471	$ 446