Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Goodwill - Additional Information (Detail) - USD ($)	May 01, 2018	May 01, 2017	May 01, 2016	Jun. 30, 2018	Jun. 30, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Accumulated goodwill impairment				$ 11,300,000,000	$ 11,300,000,000
Goodwill impairment charge	$ 0	$ 0	$ 0