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Share Repurchase | 9 Months Ended
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Jun. 30, 2018
Equity [Abstract] |
Share Repurchase | Share Repurchase On June 21, 2016, the Company's Board of Directors authorized the repurchase of up to $500.0 million of the Company's outstanding common stock over a five-year period. During the nine months ended June 30, 2018, the Company repurchased 5.0 million shares of its common stock for total consideration of $187.3 million. As of June 30, 2018, $112.8 million remained available to be repurchased under this authorization. On June 13, 2018, the Company's Board of Directors authorized another share repurchase plan to repurchase up to $500.0 million of the Company's outstanding common stock. This share repurchase plan, which replaces the prior plan, is effective August 1, 2018 and expires on June 13, 2023.

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- Definition The entire disclosure for treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -URI http://asc.fasb.org/subtopic&trid=2208821 + Details
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