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Share-Based Compensation (Tables) | 6 Months Ended
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Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Total Share-based Compensation Expense by Type of Award | The following table provides total share-based compensation expense by type of award:
| Three Months Ended December 31,
(in millions) | 2018 |  | 2017
Restricted share unit expense | $ | 16 |  |  | $ | 16 |
Employee stock option expense | 2 |  |  | 5 |
Performance share unit expense | 4 |  |  | 2 |
Total share-based compensation | $ | 22 |  |  | $ | 23 |
| Six Months Ended December 31,
(in millions) | 2018 |  | 2017
Restricted share unit expense | $ | 30 |  |  | $ | 34 |
Employee stock option expense | 6 |  |  | 10 |
Performance share unit expense | 5 |  |  | (4 | )
Total share-based compensation | $ | 41 |  |  | $ | 40 |
Schedule of Stock Option Transactions Under the Plans | The following table summarizes all stock option transactions under the Plans:
(in millions, except per share amounts) | Stock Options |  | Weighted-Average Exercise Price per Common Share
Outstanding at June 30, 2018 | 7 |  |  | $ | 64.50 |
Granted | — |  |  | — |
Exercised | — |  |  | — |
Canceled and forfeited | — |  |  | — |
Outstanding at December 31, 2018 | 7 |  |  | $ | 64.05 |
Exercisable at December 31, 2018 | 6 |  |  | $ | 62.92 |
Schedule of Additional Data Related to Stock Option Activity | The following tables provide additional detail related to stock options:
(in millions) | December 31, 2018 |  | June 30, 2018
Aggregate intrinsic value of outstanding options at period end | $ | 6 |  |  | $ | 13 |
Aggregate intrinsic value of exercisable options at period end | 6 |  |  | 13 |
(in years) | December 31, 2018 |  | June 30, 2018
Weighted-average remaining contractual life of outstanding options | 6 |  | 7
Weighted-average remaining contractual life of exercisable options | 6 |  | 5
Schedule of Transactions Related to Restricted Share Units Under the Plans | The following table summarizes all transactions related to restricted share units under the Plans:
(in millions, except per share amounts) | Restricted Share Units |  | Weighted-Average Grant Date Fair Value per Share
Nonvested at June 30, 2018 | 2 |  |  | $ | 71.58 |
Granted | 2 |  |  | 50.46 |
Vested | (1 | ) |  | 75.19 |
Canceled and forfeited | — |  |  | — |
Nonvested at December 31, 2018 | 3 |  |  | $ | 52.23 |
Schedule of Transactions Related to Performance Share Units Under the Plans | The following table summarizes all transactions related to performance share units under the Plans (based on target award amounts):
(in millions, except per share amounts) | Performance Share Units |  | Weighted-Average Grant Date Fair Value per Share
Nonvested at June 30, 2018 | 0.4 |  |  | $ | 66.13 |
Granted | 0.4 |  |  | 50.90 |
Vested (1) | (0.1 | ) |  | 84.27 |
Canceled and forfeited | — |  |  | — |
Nonvested at December 31, 2018 | 0.6 |  |  | $ | 51.09 |
The sum of the components may not equal the total due to rounding.
(1) | No payout was made because the threshold performance goal was not met.

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested performance-based units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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