Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets - Goodwill (Details)

v2.4.0.6
Goodwill and Intangible Assets - Goodwill (Details) (USD $)
In Billions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]    
Goodwill $ 6.4 $ 6.4