Segment Information (Revenue and Property and Equipment, net by Geographic Area) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 27,547	$ 25,375	$ 25,537	$ 24,070	$ 22,894	$ 21,427	$ 22,240	$ 24,523	$ 102,531	$ 91,084	$ 101,093
Property and equipment, net	1,506				1,459				1,506	1,459	1,489
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									98,435	87,449	97,994
Property and equipment, net	1,327				1,301				1,327	1,301	1,355
International
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									4,096	3,635	3,099
Property and equipment, net	$ 179				$ 158				$ 179	$ 158	$ 134