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Stock Transactions Stock Transactions (Narrative) (Details) - USD ($) $ in Millions | Sep. 30, 2015 | Jul. 31, 2015 | Jan. 22, 2015
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Equity, Class of Treasury Stock [Line Items] |  |  |
Stock Repurchase Program, Authorized Amount | $ 450.0 | $ 150.0 | $ 300.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount | $ 125.7 |  |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
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- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
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