Share-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Additional option issued (in shares)	0
Dividend yield	0.00%	0.00%	0.00%
Aggregate intrinsic value of stock options and cash-based stock appreciation rights, outstanding	$ 88	$ 80	$ 56
Aggregate intrinsic value of stock options and cash-based stock appreciation rights, exercised	88	80	56
Total intrinsic value of stock options and cash-based stock appreciation rights, exercised	$ 49	$ 20	$ 15
Unrecognized compensation cost, weighted-average period of recognition, years	2 years
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance share grant, period	12 months
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance share grant, period	36 months
Stock Options and Cash-Based Stock Appreciation Rights
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average fair values of stock options granted under the stock option Plan (in USD per share)		$ 14.79	$ 20.66
Share based compensation expense attributable to non-vested shares	$ 9
Restricted Share Awards, Restricted Share Units, and Cash-Based Restricted Share Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation expense attributable to non-vested shares	$ 68
Unrecognized compensation cost, weighted-average period of recognition, years	2 years
Share based compensation, vesting period years	3 years
Total fair value of restricted stock grant	$ 59	$ 11	$ 10
Total fair value of restricted stock vested	69	75	20
Performance Share Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation expense attributable to non-vested shares	$ 12
Unrecognized compensation cost, weighted-average period of recognition, years	1 year 7 months 24 days
Share based compensation, vesting period years	3 years
Total fair value of restricted stock grant	$ 14	15	10
Total fair value of restricted stock vested	$ 9	$ 6	$ 11
Shares issued, percentage of target award based on actual results	200.00%
Omnibus Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock authorized for issuance under the Plan (in shares)	9,550,000
Shares available to be issued under the Plan (in shares)	8,000,000

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Total fair value of restricted and performance shares granted during the period.

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Share-based Compensation, Shares Issued, Percentage of Target Award Based On Actual Results

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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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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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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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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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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of shares authorized for issuance under share-based payment arrangement.

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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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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Gross number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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