Net Debt - Summary of Cash and Cash Equivalents, Net of Overdrafts (Detail) - USD ($) $ in Millions	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Cash and cash equivalents if different from statement of financial position [abstract]
Total cash and cash equivalents	$ 13,426	$ 15,613	$ 15,871
Bank overdrafts and short-term borrowings	0	(20)	(58)
Total cash and cash equivalents, net of overdrafts	$ 13,426	$ 15,593	$ 15,813	$ 14,108

The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents]

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