Quicksilver Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended
Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized	400,000,000		400,000,000
Shares of common stock outstanding	183,100,000		180,400,000
Common stock, par value	$ 0.01		$ 0.01
Preferred stock, shares authorized	10,000,000		10,000,000
Preferred stock, shares outstanding	0		0
Preferred stock, par value	$ 0.01		$ 0.01
Common stock, shares issued	191,487,376		187,802,994
Treasury stock, shares	8,378,865		7,444,372
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 6.1
Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition	January 2018
Estimated grant date fair value	$ 0.6
Fair value of RSUs settled in cash	0.0
Allocated Share-based Compensation Expense	4.9	$ 8.4
Total fair value of shares vested	$ 0.5
Equity Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested and Expected to Vest, outstanding shares	6,100,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 0.3
Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition	August 2016
Allocated Share-based Compensation Expense	$ 0.2	$ 1.1
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Shares	0	0

Estimated grant date fair value of restricted stock and stock-settled restricted stock units.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Face amount or stated value per share of common stock.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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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.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Net number of share options (or share units) granted during the period.

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As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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