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Employee Stock and Savings Plans - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2020		Jun. 30, 2019	Jun. 30, 2018
Compensation Related Costs Disclosure [Line Items]
Company contribution amount for each dollar a participant contributes into the savings plans	50.00%
Retirement benefits for saving plans funded by employer	$ 1,000		$ 877	$ 807
Upper Limit | IRS Compensation Limit
Compensation Related Costs Disclosure [Line Items]
Percentage of employee's earnings the company may contribute into the savings plans	50.00%
Stock Awards
Compensation Related Costs Disclosure [Line Items]
Shares authorized for future grant	283
Unrecognized compensation costs	$ 10,200
Unrecognized compensation costs are expected to be recognized over a weighted average period (years)	3 years
Weighted average grant-date fair value	$ 140.49	[1]	$ 107.02	$ 75.88
Fair value of awards vested	$ 10,100		$ 8,700	$ 6,600
Stock Awards | Lower Limit
Compensation Related Costs Disclosure [Line Items]
Award vest period	4 years
Stock Awards | Upper Limit
Compensation Related Costs Disclosure [Line Items]
Award vest period	5 years
Restricted Stock Units | Executive Incentive Plan
Compensation Related Costs Disclosure [Line Items]
Award vest period	4 years
Performance Stock Units | Executive Incentive Plan
Compensation Related Costs Disclosure [Line Items]
Award vest period	3 years
Employee Stock
Compensation Related Costs Disclosure [Line Items]
Shares authorized for future grant	96
Percentage of market value at which employees are able to purchase shares of common stock	90.00%		90.00%	90.00%
Maximum percentage of gross compensation at which employees may purchase shares	15.00%		15.00%	15.00%
[1] Includes 2 million, 2 million, and 3 million of PSUs granted at target and performance adjustments above target levels for fiscal years 2020, 2019, and 2018, respectively.

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Amount of cost for defined contribution plan.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Purchase price of common stock expressed as a percentage of its fair value.

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