Changes in Restructuring Liability (Detail) $ in Millions	6 Months Ended
	Dec. 31, 2017 USD ($)
Restructuring Cost and Reserve [Line Items]
Balance, as of June 30, 2017	$ 432
Restructuring charges	0
Cash paid	(307)
Other	(7)
Balance, as of December 31, 2017	118
Severance
Restructuring Cost and Reserve [Line Items]
Balance, as of June 30, 2017	373
Restructuring charges	0
Cash paid	(292)
Other	0
Balance, as of December 31, 2017	81
Other
Restructuring Cost and Reserve [Line Items]
Balance, as of June 30, 2017	59	[1]
Restructuring charges	0	[1]
Cash paid	(15)	[1]
Other	(7)	[1]
Balance, as of December 31, 2017	$ 37	[1]

[1] Primarily reflects activities associated with the consolidation of our phone facilities, manufacturing operations, and contract termination costs.