Long-Term Debt (Schedule Of Outstanding Debt) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Combined Credit Agreements [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity	$ 325
Credit Agreement Repayment Term Trigerring Event, Maximum Threshold For Measurement	100
Senior Secured Second Lien Credit Facility [Member]
Debt Instrument [Line Items]
Credit Agreement Repayment Term Trigerring Event, Maximum Threshold For Measurement	100
Senior Notes Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument Year Of Maturity	2019
Canadian Credit Facility [Member]
Debt Instrument [Line Items]
Equity interests	100.00%
Multiple Subsidiaries Set One [Member] | U.S. Credit Facility [Member]
Debt Instrument [Line Items]
Equity interests	100.00%
Multiple Subsidiaries Set Two [Member] | U.S. Credit Facility [Member]
Debt Instrument [Line Items]
Equity interests	65.00%
Maximum [Member] | U.S. Credit Facility [Member]
Debt Instrument [Line Items]
Commitment fee percentage	1.75%
Applicable margin in addition to interest rate	2.75%
First Mortgage [Member] | Combined Credit Agreements [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity	325	[1],[2]
Scheduled maturity date	Sep. 06, 2016	[3]
Debt Instrument, Potential Earliest Maturity Date	October 1, 2015	[3]
Debt Instrument, Interest Rate, Stated Percentage	4.09%	[4]
Base Interest Rate Options	LIBOR, ABR, CDOR	[5],[6]
Financial covenants	- Minimum current ratio of 1.0 - Minimum EBITDA to cash interest expense ratio of 1.10 - Maximum senior secured debt leverage ratio of 2.0	[7],[8]
Significant restrictive covenants	- Incurrence of debt - Incurrence of liens - Payment of dividends - Equity purchases - Asset sales - Affiliate transactions - Limitations on derivatives and investments	[8],[9]
Optional redemption	Any time	[8]
Make-whole redemption	N/A
Change of control	Event of default	[8]
Equity Clawback	N/A
Estimated fair value	276.0	[10]
Current ratio	1.0
Minimum EBITDA to cash interest expense ratio	1.10
Senior secured debt leverage ratio	2.0
Second Lien Debt [Member] | Senior Secured Second Lien Credit Facility [Member]
Debt Instrument [Line Items]
Principal amount	625	[2]
Scheduled maturity date	Jun. 21, 2019	[3]
Debt Instrument, Potential Earliest Maturity Date	January 1, 2016	[3]
Debt Instrument, Interest Rate, Stated Percentage	7.00%
Base Interest Rate Options	LIBOR floor of 1.25%; ABR floor of 2.25%
Financial covenants	N/A
Significant restrictive covenants	- Incurrence of debt - Incurrence of liens and 1st lien cap -Payment of dividends - Equity purchases - Asset sales - Affiliate transactions	[8],[9]
Optional redemption	Any time, subject to re-pricing event June 21, 2015: 101	[8]
Make-whole redemption	N/A
Change of control	Put at 101% of principal plus accrued interest	[8]
Equity Clawback	N/A
Estimated fair value	568.8	[10]
Percentage of principal plus accrued interest for change of control	101.00%
Second Lien Debt [Member] | Senior Secured Second Lien Term Loan Due 2019 [Member]
Debt Instrument [Line Items]
Principal amount	200	[2]
Scheduled maturity date	Jun. 21, 2019	[3]
Debt Instrument, Potential Earliest Maturity Date	January 1, 2016	[3]
Debt Instrument, Interest Rate, Stated Percentage	7.00%
Base Interest Rate Options	LIBOR floor of 1.25%
Financial covenants	N/A
Significant restrictive covenants	- Incurrence of debt - Incurrence of liens and 1st lien cap -Payment of dividends - Equity purchases - Asset sales - Affiliate transactions	[8],[9]
Optional redemption	Any time, subject to re-pricing event June 21, 2015: 101	[8]
Make-whole redemption	N/A
Change of control	Put at 101% of principal plus accrued interest	[8]
Equity Clawback	N/A
Estimated fair value	182.0	[10]
Percentage of principal plus accrued interest for change of control	101.00%
Senior Notes [Member] | Senior Notes Due 2019 [Member]
Debt Instrument [Line Items]
Principal amount	298
Scheduled maturity date	Aug. 15, 2019
Debt Instrument, Potential Earliest Maturity Date	N/A
Debt Instrument, Interest Rate, Stated Percentage	9.125%
Base Interest Rate Options	N/A
Financial covenants	N/A
Significant restrictive covenants	- Incurrence of debt - Incurrence of liens -Payment of dividends - Equity purchases - Asset sales - Affiliate transactions	[8],[9]
Optional redemption	August 15, 2014: 104.563 2015: 103.042 2016: 101.521 2017: par	[8]
Make-whole redemption	N/A
Make-whole redemption	0.50%
Change of control	Put at 101% of principal plus accrued interest	[8]
Equity Clawback	N/A
Estimated fair value	186.3	[10]
Percentage of principal plus accrued interest for change of control	101.00%
Senior Notes [Member] | Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Principal amount	325
Scheduled maturity date	Jul. 01, 2021
Debt Instrument, Potential Earliest Maturity Date	N/A
Debt Instrument, Interest Rate, Stated Percentage	11.00%
Base Interest Rate Options	N/A
Financial covenants	N/A
Significant restrictive covenants	- Incurrence of debt - Incurrence of liens -Payment of dividends - Equity purchases - Asset sales - Affiliate transactions	[8],[9]
Optional redemption	July 1, 2019: 102.000 2020: par	[8]
Make-whole redemption	Callable prior to July 1, 2019 at make-whole call price of Treasury +50 bps	[8]
Make-whole redemption	0.50%
Change of control	Put at 101% of principal plus accrued interest	[8]
Equity Clawback	Redeemable until July 1, 2016 at 111.00%, plus accrued interest for up to 35%	[8]
Equity Clawback	111.00%
Estimated fair value	213.7	[10]
Percentage of principal plus accrued interest for change of control	101.00%
Senior Subordinated Notes [Member] | Senior Subordinated Notes [Member]
Debt Instrument [Line Items]
Principal amount	350
Scheduled maturity date	Apr. 01, 2016
Debt Instrument, Potential Earliest Maturity Date	N/A
Debt Instrument, Interest Rate, Stated Percentage	7.125%
Base Interest Rate Options	N/A
Financial covenants	N/A
Significant restrictive covenants	- Incurrence of debt - Incurrence of liens -Payment of dividends - Equity purchases - Asset sales - Affiliate transactions	[8],[9]
Optional redemption	Any time	[8]
Make-whole redemption	N/A
Change of control	Put at 101% of principal plus accrued interest	[8]
Equity Clawback	N/A
Estimated fair value	$ 136.5	[10]
Percentage of principal plus accrued interest for change of control	101.00%
Libor [Member] | Maximum [Member] | Canadian Credit Facility [Member]
Debt Instrument [Line Items]
Applicable margin in addition to interest rate	3.75%
Libor [Member] | Minimum [Member] | Canadian Credit Facility [Member]
Debt Instrument [Line Items]
Applicable margin in addition to interest rate	2.75%
Libor [Member] | Second Lien Debt [Member] | Senior Secured Second Lien Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Reference Rate, Floor	1.25%
Libor [Member] | Second Lien Debt [Member] | Senior Secured Second Lien Term Loan Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Reference Rate, Floor	1.25%
ABR [Member] | Second Lien Debt [Member] | Senior Secured Second Lien Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Reference Rate, Floor	2.25%
CDOR Rate [Member] | Maximum [Member] | Canadian Credit Facility [Member]
Debt Instrument [Line Items]
Applicable margin in addition to interest rate	3.75%
CDOR Rate [Member] | Minimum [Member] | Canadian Credit Facility [Member]
Debt Instrument [Line Items]
Applicable margin in addition to interest rate	2.75%
LIBOR [Member] | U.S. Credit Facility [Member]
Debt Instrument [Line Items]
Applicable margin in addition to interest rate	1.00%
Canadian Prime Rate [Member] | Maximum [Member] | Canadian Credit Facility [Member]
Debt Instrument [Line Items]
Applicable margin in addition to interest rate	2.75%
Canadian Prime Rate [Member] | Minimum [Member] | Canadian Credit Facility [Member]
Debt Instrument [Line Items]
Applicable margin in addition to interest rate	1.75%
U.S. Prime Rate [Member] | Maximum [Member] | Canadian Credit Facility [Member]
Debt Instrument [Line Items]
Applicable margin in addition to interest rate	2.75%
U.S. Prime Rate [Member] | Minimum [Member] | Canadian Credit Facility [Member]
Debt Instrument [Line Items]
Applicable margin in addition to interest rate	1.75%
2013 [Member] | Senior Notes [Member] | Senior Notes Due 2015 [Member]
Debt Instrument [Line Items]
Redemption percentage of par value	101.938%
2013 [Member] | Senior Notes [Member] | Senior Notes Due 2016 [Member]
Debt Instrument [Line Items]
Redemption percentage of par value	105.875%
2014 [Member] | Second Lien Debt [Member] | Senior Secured Second Lien Credit Facility [Member]
Debt Instrument [Line Items]
Redemption percentage of par value	102.00%
2014 [Member] | Second Lien Debt [Member] | Senior Secured Second Lien Term Loan Due 2019 [Member]
Debt Instrument [Line Items]
Redemption percentage of par value	102.00%
2014 [Member] | Senior Notes [Member] | Senior Notes Due 2019 [Member]
Debt Instrument [Line Items]
Redemption percentage of par value	104.563%
2014 [Member] | Senior Subordinated Notes [Member] | Senior Subordinated Notes [Member]
Debt Instrument [Line Items]
Redemption percentage of par value	100.00%
2015 [Member] | Second Lien Debt [Member] | Senior Secured Second Lien Credit Facility [Member]
Debt Instrument [Line Items]
Redemption percentage of par value	101.00%
2015 [Member] | Second Lien Debt [Member] | Senior Secured Second Lien Term Loan Due 2019 [Member]
Debt Instrument [Line Items]
Redemption percentage of par value	101.00%
2015 [Member] | Senior Notes [Member] | Senior Notes Due 2019 [Member]
Debt Instrument [Line Items]
Redemption percentage of par value	103.042%
2016 [Member] | Senior Notes [Member] | Senior Notes Due 2019 [Member]
Debt Instrument [Line Items]
Redemption percentage of par value	101.521%
2017 [Member] | Senior Notes [Member] | Senior Notes Due 2019 [Member]
Debt Instrument [Line Items]
Redemption percentage of par value	100.00%
2019 [Member] | Senior Notes [Member] | Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Redemption percentage of par value	102.00%
2020 [Member] | Senior Notes [Member] | Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Redemption percentage of par value	100.00%

[1] The principal amount for the Combined Credit Agreements represents the global borrowing base as of September 30, 2014.

[2] Borrowings under the Amended and Restated U.S. Credit Facility, Second Lien Term Loan and Second Lien Notes due 2019 are guaranteed by certain of Quicksilver’s domestic subsidiaries and are secured (on a first priority basis with respect to the Amended and Restated U.S. Credit Facility and on a second priority basis with respect to the Second Lien Term Loan and the Second Lien Notes due 2019) by 100% of the equity interests of each of Cowtown Pipeline Management, Inc., Cowtown Pipeline Funding, Inc., Cowtown Gas Processing L.P., Cowtown Pipeline L.P., Barnett Shale Operating LLC, Silver Stream Pipeline Company LLC, QPP Parent LLC and QPP Holdings LLC (collectively, the “Domestic Pledged Equity”), 65% of the equity interests of Quicksilver Resources Canada Inc. (“Quicksilver Canada”) and Quicksilver Production Partners Operating Ltd. (with respect to the Amended and Restated U.S. Credit Facility, on a ratable basis with borrowings under the Amended and Restated Canadian Credit Facility) and the majority of Quicksilver's domestic proved oil and gas properties and related assets, (the “Domestic Pledged Property”). Borrowings under the Amended and Restated Canadian Credit Facility are guaranteed by Quicksilver and certain of its domestic subsidiaries and are secured by the Domestic Pledged Equity, the Domestic Pledged Property, 100% of the equity interests of Quicksilver Canada (65% of which is on a ratable basis with the borrowings under the Amended and Restated U.S. Credit Facility) and any Canadian restricted subsidiaries, under the Amended and Restated Canadian Credit Facility, and 65% of the equity interests of Quicksilver Production Partners Operating Ltd. (which is on a ratable basis with the borrowings under the Amended and Restated U.S. Credit Facility) and the majority of Quicksilver Canada's oil and gas properties and related assets. The other debt presented is based upon structural seniority and priority of payment.

[3] The Combined Credit Agreements are required to be repaid 91 days prior to the maturity of the Senior Subordinated Notes, the Second Lien Term Loan or the Second Lien Notes due 2019, if on the applicable date any amount of such debt remains outstanding. The Second Lien Term Loan and Second Lien Notes due 2019 are required to be repaid (1) 91 days prior to the maturity of the 2019 Senior Notes if more than $100 million of the 2019 Senior Notes remain outstanding and (2) 91 days prior to the maturity of the Senior Subordinated Notes if on the applicable date the amount remaining outstanding is greater than $100 million. As of September 30, 2014, as presently structured and assuming no changes in the amounts outstanding, amounts outstanding under the Combined Credit Agreements would be due on October 1, 2015 and the Second Lien Term Loan and Second Lien Notes due 2019 would be due on January 1, 2016.

[4] Represents the weighted average borrowing rate payable to lenders.

[5] Amounts outstanding under the Amended and Restated U.S. Credit Facility bear interest, at our election, at (i) adjusted LIBOR (as defined in the Amended and Restated U.S. Credit Facility) plus an applicable margin between 2.75% and 3.75%, (ii) ABR (as defined in the Amended and Restated U.S. Credit Facility), which is the greatest of (a) the prime rate announced by JPMorgan, (b) the federal funds rate plus 0.50% and (c) adjusted LIBOR for an interest period of one month plus 1.00%, plus, in each case under scenario (ii), an applicable margin between 1.75% and 2.75%. We also pay a per annum fee on the LC Exposure (as defined in the Amended and Restated U.S. Credit Facility) of all letters of credit issued under the Amended and Restated U.S. Credit Facility equal to the applicable margin, with respect to Eurodollar loans, and a commitment fee on the unused availability under the Amended and Restated U.S. Credit Facility of 0.50%.

[6] Amounts outstanding under the Amended and Restated Canadian Credit Facility bear interest, at our election, at (i) the CDOR Rate (as defined in the Amended and Restated Canadian Credit Facility) plus an applicable margin between 2.75% and 3.75%, (ii) the Canadian Prime Rate (as defined in the Amended and Restated Canadian Credit Facility) plus an applicable margin between 1.75% and 2.75%, (iii) the U.S. Prime Rate (as defined in the Amended and Restated Canadian Credit Facility) plus an applicable margin between 1.75% and 2.75% and (iv) adjusted LIBOR (as defined in the Amended and Restated Canadian Credit Facility) plus an applicable margin between 2.75% and 3.75%. We pay a per annum fee on the LC Exposure (as defined in the Amended and Restated Canadian Credit Facility) of all letters of credit issued under the Amended and Restated Canadian Credit Facility equal to the applicable margin, with respect to Eurodollar loans, and a commitment fee on the unused availability under the Amended and Restated Canadian Credit Facility of 0.50%.

[7] As of September 30, 2014, the future minimum required interest coverage ratio for the Combined Credit Agreements is as follows:Period Interest Coverage Ratio Period Interest Coverage RatioQ4 2014 1.10 Q4 2015 1.20Q1 2015 1.10 Q1 2016 1.50Q2 2015 1.15 Q2 2016 2.00Q3 2015 1.15 In November 2014, the Combined Credit Agreements were amended to eliminate the requirement to meet the minimum interest coverage ratio covenant beginning in the fourth quarter of 2014 through and including the fourth quarter of 2015. A minimum EBITDAX covenant was added beginning in the fourth quarter of 2014 through and including the fourth quarter of 2015 that requires the following minimum EBITDAX levels: Minimum EBITDAX Covenant (in millions)Three months ending December 31, 2014$30.0Six months ending March 31, 201559.0Nine months ending June 30, 201587.25Twelve months ending September 30, 2015120.5Twelve months ending December 31, 2015122.0

[8] The information presented in this table is qualified in all respects by reference to the full text of the covenants, provisions and related definitions contained in the documents governing the various components of our debt.

[9] Our indentures require us to reinvest or repay senior debt with net cash proceeds from certain asset sales within one year.

[10] The estimated fair value is determined using market quotations based on recent trade activity for fixed rate obligations (“Level 2” inputs). Our Second Lien Term Loan and Second Lien Notes due 2019 feature variable interest rates and we estimate their fair value by using market quotations based on recent trade activity (“Level 3” input). We consider our Combined Credit Agreements which have a variable interest rate to have a fair value equal to their carrying value (“Level 1” input).