XML 77 R41.htm IDEA: XBRL DOCUMENT v2.4.0.6
Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Goodwill And Intangible Assets Disclosure [Abstract]    
Other indefinite-lived intangible assets $ 132 $ 132
Carrying value of definite-lived intangible assets 18 19
Accumulated amortization $ 58 $ 57