Share-Based Compensation (Schedule of All Transactions Related to Performance Share Units Under the Plans) (Details) - Performance Share Units $ / shares in Units, shares in Millions, $ in Millions	6 Months Ended
Dec. 31, 2018 USD ($) $ / shares shares
Performance Share Units
Nonvested at beginning of period (in shares) \| shares	0.4
Granted (in shares) \| shares	0.4
Vested (in shares) \| shares	(0.1)
Canceled and forfeited (in shares) \| shares	0.0
Nonvested at end of period (in shares) \| shares	0.6
Weighted-Average Grant Date Fair Value per Share
Nonvested at beginning of period (in usd per share) \| $ / shares	$ 66.13
Granted (in usd per share) \| $ / shares	50.90
Vested (in usd per share) \| $ / shares	84.27
Canceled and forfeited (in usd per share) \| $ / shares	0.00
Nonvested at end of period (in usd per share) \| $ / shares	$ 51.09
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized \| $	$ 22
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	2 years
Award vesting period (in years)	3 years

Unrecognized cost of unvested share-based compensation awards.

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-SubTopic 10
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-Subparagraph (i)
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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made 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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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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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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