Stockholders' Equity (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |||||
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Jun. 30, 2017 |
Mar. 31, 2017 |
Mar. 31, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Feb. 13, 2017 |
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Stockholders' Equity Note, Stock Split | 1.333 | ||||||
Stock Repurchase Program, Authorized Amount | $ 300.0 | $ 300.0 | |||||
Stock Repurchase Program, Period in Force | 3 years | ||||||
Treasury Stock, Shares, Acquired | 1,650,000 | 1,850,000 | |||||
Payments for Repurchase of Common Stock | $ 65.2 | $ 68.3 | $ 133.5 | $ 0.7 | $ 0.3 | ||
Preferred Stock, Shares Authorized | 100,000,000 | 100,000,000 | |||||
Preferred Stock, Shares Issued | 0 | 0 | |||||
Preferred Stock, Shares Outstanding | 0 | 0 | |||||
Redeemable noncontrolling interest change | $ 59.5 | ||||||
Redeemable Noncontrolling Interest, Equity, Fair Value | $ 0.0 | $ 0.0 |
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- Definition Change in redeemable noncontrolling interest during the period. No definition available.
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- Definition The cash outflow to reacquire common stock during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The aggregate fair value as of the reporting date of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of stock repurchase plan authorized. No definition available.
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- Definition Period which shares may be purchased under a stock repurchase plan authorized by an entity's Board of Directors, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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- Definition Description of the stock split arrangement. Also provide the retroactive effect given by a stock split that occurs after the balance date but before the release of financial statements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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