Goodwill and Other Intangible Assets - Identifiable Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 35,891
Finite-Lived Intangible Assets, Accumulated Amortization	4,728
INTANGIBLE ASSETS WITH DETERMINABLE LIVES
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	9,026
Finite-Lived Intangible Assets, Accumulated Amortization	4,728
INTANGIBLE ASSETS WITH INDEFINITE LIVES
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 26,865