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Share-Based Compensation and Savings Plans (Additional Data Related to Performance Share Unit Activity) (Details) (Performance Share Units, USD $) In Millions, unless otherwise specified | 12 Months Ended
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Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2012
Performance Share Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Total compensation cost, net of estimated forfeitures, related to unvested awards not yet recognized, pre-tax | $ 15 | $ 12 | $ 12
Weighted-average period over which award cost is expected to be recognized (in years) | 2 years | 2 years | 2 years
Total fair value of shares vested during the year | $ 7 | $ 0 | $ 0

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- Definition Unrecognized cost of unvested share-based compensation awards. + 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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