Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization expense	$ 1,700	$ 978	$ 1,300
Amortization of capitalized software	$ 55	69	79
Devices
Finite-Lived Intangible Assets [Line Items]
Impairment charges of intangible assets		$ 480
Phone Hardware
Finite-Lived Intangible Assets [Line Items]
Impairment charges of intangible assets			$ 2,200