Goodwill and Other Intangible Assets - Identifiable Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Jun. 30, 2012
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 37,018
Finite-Lived Intangible Assets, Accumulated Amortization	4,871
Goodwill	55,687	53,773
INTANGIBLE ASSETS WITH DETERMINABLE LIVES
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	9,957
Finite-Lived Intangible Assets, Accumulated Amortization	4,871
INTANGIBLE ASSETS WITH INDEFINITE LIVES
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 27,061