Restructuring Charges - Additional Information (Detail) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) Position	Jun. 30, 2016 USD ($) Position	Jun. 30, 2015 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 306
Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 306
Phone Hardware Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | Position			7,400
Restructuring charges				$ 780
Reversal of prior year restructuring charges			$ (21)
Completion date		Jun. 30, 2017
2016 Restructuring
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | Position		4,700
Restructuring charges	$ 480		$ 501
Completion date		Jun. 30, 2017
2017 Restructuring
Restructuring Cost and Reserve [Line Items]
Completion date		Jun. 30, 2018
2017 Restructuring | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 306