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Fair Value Measurements (Tables) | 9 Months Ended
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Mar. 31, 2012
Fair Value Measurements [Abstract] |
Schedule Of Fair Value Of Assets And Liabilities Measured On Recurring Basis |
March 31, 2012 |  | Fair Value Measurements Using Input Type |  |  |  |
($ in millions) |  | Level 1 |  |  | Level 2 |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Marketable securities |  |  |  |  |  |  |  |  |  |  |  |
Municipal auction rate securities |  | $ | — |  |  | $ | 5.1 |  |  | $ | 5.1 |
Derivative financial instruments |  |  | — |  |  |  | 3.0 |  |  |  | 3.0 |
Total assets |  | $ | — |  |  | $ | 8.1 |  |  | $ | 8.1 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Derivative financial instruments |  | $ | — |  |  | $ | 46.5 |  |  | $ | 46.5 |
June 30, 2011 |  | Fair Value Measurements Using Input Type |  |  |  |
($ in millions) |  | Level 1 |  |  | Level 2 |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Marketable securities |  |  |  |  |  |  |  |  |  |  |  |
Government agency bonds |  | $ | 13.7 |  |  | $ | — |  |  | $ | 13.7 |
Corporate bonds |  |  | 15.1 |  |  |  | — |  |  |  | 15.1 |
Commercial paper |  |  | 1.7 |  |  |  | — |  |  |  | 1.7 |
Municipal auction rate securities |  |  | — |  |  |  | 5.3 |  |  |  | 5.3 |
Derivative financial instruments |  |  | — |  |  |  | 20.0 |  |  |  | 20.0 |
Total assets |  | $ | 30.5 |  |  | $ | 25.3 |  |  | $ | 55.8 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Derivative financial instruments |  | $ | — |  |  | $ | 14.1 |  |  | $ | 14.1 |
Carrying Amounts And Estimated Fair Values Of Financial Instruments |
|  | March 31, 2012 |  |  | June 30, 2011 |
|  | Carrying |  |  | Fair |  |  | Carrying |  |  | Fair |
($ in millions) |  | Value |  |  | Value |  |  | Value |  |  | Value |
Long-term debt, including current portion |  | $ | 407.2 |  |  | $ | 418.2 |  |  | $ | 507.8 |  |  | $ | 515.9 |
Company-owned life insurance |  | $ | 11.8 |  |  | $ | 11.8 |  |  | $ | 11.4 |  |  | $ | 11.4 |

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- Definition Tabular disclosure of the total amount of gains or losses for the period which are included in earnings or resulted in a change to net assets which gains or losses have arisen from the use of significant unobservable inputs (Level 3) to measure the fair value of assets and liabilities. Such gains or losses are attributable to the change in unrealized gains or losses relating to those assets and liabilities so valued which are still held at the reporting date and which change are also considered for disclosure; it may be expected that a description of where those unrealized gains or losses are reported in the statement of income or the statement of financial position would also be disclosed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1),(d) -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258 + Details
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