Segment Information (Revenue and Property and Equipment, net by Geographic Area) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Segments, Geographical Areas [Abstract]
Revenue, United States									$ 97,994	$ 105,205	$ 101,080
Revenue, International									3,099	2,347	1,564
Revenue	25,420	24,552	25,232	25,889	26,764	26,918	27,078	26,792	101,093	107,552	102,644
Property and Equipment, net, United States	1,355				1,425				1,355	1,425	1,398
Property and Equipment, net, International	134				126				134	126	114
Property and equipment, net	$ 1,489				$ 1,551				$ 1,489	$ 1,551	$ 1,512

Amount of long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets, located in the entity's country of domicile.

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