Impairment and Restructuring Charges - Schedule of Changes in Restructuring Program Liabilities (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring Liabilities, Beginning Balance	$ 36	$ 40	$ 42	$ 49
Additions	19	12	37	27
Payments	(21)	(17)	(45)	(40)
Other	(1)	1	(1)	0
Restructuring Liabilities, Ending Balance	33	36	33	36
One Time Employee Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Liabilities, Beginning Balance	23	25	29	33
Additions	19	11	37	26
Payments	(21)	(15)	(44)	(38)
Other	(1)	1	(2)	1
Restructuring Liabilities, Ending Balance	20	22	20	22
Facility Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Liabilities, Beginning Balance	2	5	2	6
Additions	0	0	0	0
Payments	0	(1)	0	(1)
Other	0	0	0	(1)
Restructuring Liabilities, Ending Balance	2	4	2	4
Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Liabilities, Beginning Balance	11	10	11	10
Additions	0	1	0	1
Payments	0	(1)	(1)	(1)
Other	0	0	1	0
Restructuring Liabilities, Ending Balance	$ 11	$ 10	$ 11	$ 10