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Segment Information (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2014 Segment | Mar. 31, 2013 | Jun. 30, 2013 Segment
Segment Reporting [Abstract] |  |  |  |  |
Number of Operating Segments |  |  | 2 |  | 2
Number of Reportable Segments |  |  | 2 |  | 2
Project Costs On Investment And Other Spending | $ 7 | $ 7 | $ 17 | $ 14 |

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- Definition Investment spending at the Corporate level. Investment spending generally includes the first year spend for certain projects that require incremental investments in the form of additional operating expenses. + References No definition available. + Details
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
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Period Type: | duration

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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
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