Goodwill and Other Intangible Assets - Identifiable Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 32,551
Finite-Lived Intangible Assets, Accumulated Amortization	4,984
INTANGIBLE ASSETS WITH DETERMINABLE LIVES
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	8,581
Finite-Lived Intangible Assets, Accumulated Amortization	4,984
INTANGIBLE ASSETS WITH INDEFINITE LIVES
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 23,970