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Share-Based Compensation (Tables) | 6 Months Ended
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Dec. 31, 2017
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) | 2017 |  | 2016
Restricted share unit expense | $ | 16 |  |  | $ | 17 |
Employee stock option expense | 5 |  |  | 5 |
Performance share unit expense | 2 |  |  | 2 |
Total share-based compensation | $ | 23 |  |  | $ | 24 |
| Six Months Ended December 31,
(in millions) | 2017 |  | 2016
Restricted share unit expense | $ | 34 |  |  | $ | 34 |
Employee stock option expense | 10 |  |  | 10 |
Performance share unit expense | (4 | ) |  | 3 |
Total share-based compensation | $ | 40 |  |  | $ | 47 |
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, 2017 | 6 |  |  | $ | 63.44 |
Granted | 2 |  |  | 66.44 |
Exercised | — |  |  | — |
Canceled and forfeited | — |  |  | — |
Outstanding at December 31, 2017 | 8 |  |  | $ | 64.28 |
Exercisable at December 31, 2017 | 5 |  |  | $ | 59.14 |
Schedule of Additional Data Related to Stock Option Activity | The following tables provide additional detail related to stock options:
(in millions) | December 31, 2017 |  | June 30, 2017
Aggregate intrinsic value of outstanding options at period end | $ | 47 |  |  | $ | 109 |
Aggregate intrinsic value of exercisable options at period end | 47 |  |  | 106 |
(in years) | December 31, 2017 |  | June 30, 2017
Weighted-average remaining contractual life of outstanding options | 7 |  | 7
Weighted-average remaining contractual life of exercisable options | 6 |  | 6
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, 2017 | 2 |  |  | $ | 76.72 |
Granted | 1 |  |  | 66.10 |
Vested | (1 | ) |  | 79.80 |
Canceled and forfeited | — |  |  | — |
Nonvested at December 31, 2017 | 2 |  |  | $ | 67.92 |
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, 2017 | 0.6 |  |  | $ | 77.83 |
Granted | 0.2 |  |  | 66.43 |
Vested (1) | (0.2 | ) |  | 71.57 |
Canceled and forfeited | — |  |  | — |
Nonvested at December 31, 2017 | 0.6 |  |  | $ | 75.14 |
(1) Vested based on achievement of 133 percent of the target performance goal.

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested performance-based units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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