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Pension And Other Postretirement Benefits (Tables) | 9 Months Ended
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Mar. 31, 2012
Pension And Other Postretirement Benefits [Abstract] |
Components Of The Net Periodic Benefit Cost |
Three months ended March 31, ($ in millions) |  | Pension Plans |  |  | Other Postretirement Plans |
|  | 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
Service cost |  | $ | 5.8 |  |  | $ | 5.7 |  |  | $ | 1.0 |  |  | $ | 0.7 |
Interest cost |  |  | 12.8 |  |  |  | 11.6 |  |  |  | 2.9 |  |  |  | 2.7 |
Expected return on plan assets |  |  | (13.5 | ) |  |  | (11.3 | ) |  |  | (1.6 | ) |  |  | (1.3 | )
Amortization of net loss |  |  | 4.4 |  |  |  | 7.2 |  |  |  | 0.6 |  |  |  | 1.5 |
Amortization of prior service cost (benefit) |  |  | 0.2 |  |  |  | 0.3 |  |  |  | (2.0 | ) |  |  | (1.9 | )
Net pension expense |  | $ | 9.7 |  |  | $ | 13.5 |  |  | $ | 0.9 |  |  | $ | 1.7 |
Nine months ended March 31, ($ in millions) |  | Pension Plans |  |  | Other Postretirement Plans |
|  | 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
Service cost |  | $ | 16.9 |  |  | $ | 17.1 |  |  | $ | 2.3 |  |  | $ | 2.0 |
Interest cost |  |  | 37.5 |  |  |  | 34.8 |  |  |  | 8.4 |  |  |  | 8.2 |
Expected return on plan assets |  |  | (39.7 | ) |  |  | (33.9 | ) |  |  | (4.8 | ) |  |  | (3.9 | )
Amortization of net loss |  |  | 13.2 |  |  |  | 21.6 |  |  |  | 1.9 |  |  |  | 4.4 |
Amortization of prior service cost (benefit) |  |  | 0.5 |  |  |  | 0.9 |  |  |  | (5.9 | ) |  |  | (5.7 | )
Net pension expense |  | $ | 28.4 |  |  | $ | 40.5 |  |  | $ | 1.9 |  |  | $ | 5.0 |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 715 -SubTopic 20 -Publisher FASB -Number -Article -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 + Details
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