Long-Term Debt (Schedule Of Outstanding Debt) (Details) (USD $) In Millions, unless otherwise specified									12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013 Senior Secured Second Lien Term Loan [Member]	Dec. 31, 2013 Senior Secured Second Lien Term Loan Due 2019 [Member]	Dec. 31, 2013 Canadian Credit Facility [Member]	Dec. 31, 2013 Combined Credit Agreements [Member]	Mar. 31, 2013 Combined Credit Agreements [Member]	Dec. 31, 2013 Multiple Subsidiaries Set One [Member] U.S. Credit Facility [Member]	Dec. 31, 2013 Multiple Subsidiaries Set Two [Member] U.S. Credit Facility [Member]	Dec. 31, 2013 Maximum [Member] U.S. Credit Facility [Member]	Dec. 31, 2013 Senior Subordinated Notes [Member] Rate		Dec. 31, 2013 First Mortgage [Member] Combined Credit Agreements [Member]		Dec. 31, 2013 Second Mortgage [Member] Senior Secured Second Lien Term Loan [Member] Rate		Dec. 31, 2013 Second Mortgage [Member] Senior Secured Second Lien Term Loan Due 2019 [Member]		Dec. 31, 2013 Senior Notes [Member] Senior Notes Due Two Thousand Twenty-one [Member] Rate		Dec. 31, 2013 Senior Notes [Member] Senior Notes Due 2015 [Member]		Dec. 31, 2013 Senior Notes [Member] Senior Notes Due 2016 [Member]		Dec. 31, 2013 Senior Notes [Member] Senior Notes Due 2019 [Member] Rate		Dec. 31, 2013 CDOR Rate [Member] Maximum [Member] Canadian Credit Facility [Member]	Dec. 31, 2013 CDOR Rate [Member] Minimum [Member] Canadian Credit Facility [Member]	Dec. 31, 2013 London Interbank Offered Rate (LIBOR) [Member] U.S. Credit Facility [Member]	Dec. 31, 2013 LIBOR [Member] Maximum [Member] Canadian Credit Facility [Member]	Dec. 31, 2013 LIBOR [Member] Minimum [Member] Canadian Credit Facility [Member]	Dec. 31, 2013 LIBOR [Member] Second Mortgage [Member] Senior Secured Second Lien Term Loan [Member]	Dec. 31, 2013 LIBOR [Member] Second Mortgage [Member] Senior Secured Second Lien Term Loan Due 2019 [Member]	Dec. 31, 2013 Canadian Prime Rate [Member] Maximum [Member] Canadian Credit Facility [Member]	Dec. 31, 2013 Canadian Prime Rate [Member] Minimum [Member] Canadian Credit Facility [Member]	Dec. 31, 2013 U.S. Prime Rate [Member] Maximum [Member] Canadian Credit Facility [Member]	Dec. 31, 2013 U.S. Prime Rate [Member] Minimum [Member] Canadian Credit Facility [Member]	Dec. 31, 2013 ABR [Member] Second Mortgage [Member] Senior Secured Second Lien Term Loan [Member]	Dec. 31, 2013 2013 [Member] Senior Subordinated Notes [Member]	Dec. 31, 2013 2013 [Member] Senior Notes [Member] Senior Notes Due 2015 [Member]	Dec. 31, 2013 2013 [Member] Senior Notes [Member] Senior Notes Due 2016 [Member]	Dec. 31, 2013 2014 [Member] Senior Subordinated Notes [Member]	Dec. 31, 2013 2014 [Member] Second Mortgage [Member] Senior Secured Second Lien Term Loan Due 2019 [Member]	Dec. 31, 2013 2014 [Member] Senior Notes [Member] Senior Notes Due 2015 [Member]	Dec. 31, 2013 2014 [Member] Senior Notes [Member] Senior Notes Due 2016 [Member]	Dec. 31, 2013 2014 [Member] Senior Notes [Member] Senior Notes Due 2019 [Member]	Dec. 31, 2013 2015 [Member] Second Mortgage [Member] Senior Secured Second Lien Term Loan [Member]	Dec. 31, 2013 2015 [Member] Second Mortgage [Member] Senior Secured Second Lien Term Loan Due 2019 [Member]	Dec. 31, 2013 2015 [Member] Senior Notes [Member] Senior Notes Due 2016 [Member]	Dec. 31, 2013 2015 [Member] Senior Notes [Member] Senior Notes Due 2019 [Member]	Dec. 31, 2013 Year Twenty Sixteen [Member] Senior Notes [Member] Senior Notes Due 2019 [Member]	Dec. 31, 2013 Year Twenty Seventeen [Member] Senior Notes [Member] Senior Notes Due 2019 [Member]	Dec. 31, 2013 Year Twenty Nineteen [Member] Senior Notes [Member] Senior Notes Due Two Thousand Twenty-one [Member]	Dec. 31, 2013 Year Twenty Twenty [Member] Senior Notes [Member] Senior Notes Due Two Thousand Twenty-one [Member]	Dec. 31, 2013 Combined Credit Agreements [Member]	Dec. 31, 2013 Combined Credit Agreements [Member] Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Reference Rate, Floor																															1.25%						2.25%
Current ratio												1.0
Minimum EBITDA to cash interest expense ratio												1.10
Senior secured debt leverage ratio												2.0																																										2.0
Line of Credit Facility, Current Borrowing Capacity					$ 350	$ 850						$ 350	[1],[2]
Principal amount										350				625		200		325	[2]	11	[2]	8	[2]	298	[2]
Scheduled maturity date										Apr. 01, 2016		Sep. 06, 2016	[3]	Jun. 21, 2019	[3]	Jun. 21, 2019	[3]	Jul. 01, 2021		Aug. 01, 2015		Jan. 01, 2016		Aug. 15, 2019
Interest rate on outstanding borrowings at June 30, 2012										7.125%		3.95%	[3]	7.00%		7.00%		11.00%		8.25%		11.75%		9.125%
Base interest rate options										N/A		LIBOR, ABR, CDOR	[4],[5]	LIBOR floor of 1.25%; ABR floor of 2.25%		LIBOR floor of 1.25%		N/A		N/A		N/A		N/A
Financial covenants										N/A		- 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	[6]	N/A		N/A		N/A		N/A		N/A		N/A
Significant restrictive covenants										- Incurrence of debt - Incurrence of liens -Payment of dividends - Equity purchases - Asset sales - Affiliate transactions		- Incurrence of debt - Incurrence of liens - Payment of dividends - Equity purchases - Asset sales - Affiliate transactions - Limitations on derivatives and investments	[6]	- Incurrence of debt - Incurrence of liens and 1st lien cap -Payment of dividends - Equity purchases - Asset sales - Affiliate transactions		- Incurrence of debt - Incurrence of liens and 1st lien cap -Payment of dividends - Equity purchases - Asset sales - Affiliate transactions	[6]	- Incurrence of debt - Incurrence of liens -Payment of dividends - Equity purchases - Asset sales - Affiliate transactions		- Asset sales	[6]	- Asset sales	[6]	- Incurrence of debt - Incurrence of liens -Payment of dividends - Equity purchases - Asset sales - Affiliate transactions	[6]
Optional redemption										April 1, 2013: 101.188 2014: par		Any time	[6]	Any time, subject to re-pricing event June 21, 2014: 102 2015: 101		Any time, subject to re-pricing event June 21, 2014: 102 2015: 101		July 1, 2019: 102.000 2020: par		August 1, 2013: 101.938 2014: par	[6]	July 1, 2013: 105.875 2014: 102.938 2015: par	[6]	August 15, 2014: 104.563 2015: 103.042 2016: 101.521 2017: par
Make-whole redemption										N/A		N/A		N/A		N/A		Callable prior to July 1, 2019 at make-whole call price of Treasury +50 bps	[6]	N/A		N/A		Callable prior to August 15, 2014 at make-whole call price of Treasury +50 bps
Equity Clawback										N/A		N/A		N/A		N/A		Redeemable until July 1, 2016 at 111.00%, plus accrued interest for up to 35%	[6]	N/A		N/A		N/A
Change of control										Put at 101% of principal plus accrued interest	[6]	Event of default	[6]	Put at 101% of principal plus accrued interest	[6]	Put at 101% of principal plus accrued interest		Put at 101% of principal plus accrued interest		Put at 101% of principal plus accrued interest	[6]	Put at 101% of principal plus accrued interest	[6]	Put at 101% of principal plus accrued interest
Estimated fair value										341.3	[7]	211.2		625.0		200.0		354.3	[7]	10.6	[7]	7.8	[7]	298.0	[7]
Equity interests	100.00%			100.00%			100.00%	65.00%
Secured Second Lien Repayment Term Triggering Event Related To Senior Notes Due 2019, Maximum Threshold For Measurement		$ 100	$ 100
Commitment fee percentage									1.75%																																													0.50%	0.50%
Redemption percentage of par value																																1.25%						101.188%		105.875%	100.00%	102.00%	100.00%	102.938%	104.563%	101.00%		100.00%	103.042%	101.521%	100.00%	102.00%	100.00%
Applicable margin in addition to interest rate									2.75%																	3.75%	2.75%	1.00%	3.75%	2.75%			2.75%	1.75%	2.75%	1.75%
Make-whole redemption treasury plus percentage																		0.50%						0.50%
Percentage of principal plus accrued interest for change of control										101.00%				101.00%		101.00%		101.00%		101.00%		101.00%		101.00%															101.938%								101.00%
Equity Clawback Redemption Percentage																		111.00%

[1] The principal amount for the Combined Credit Agreements represents the global borrowing base as of December 31, 2013.

[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 2015 Senior Notes, the 2016 Senior Notes, the 2016 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 2015 Senior Notes, the 2016 Senior Notes or the 2016 Senior Subordinated Notes if on the applicable date the aggregate amount of all such notes remaining outstanding is greater than $100 million.

[4] 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%.

[5] 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%.

[6] 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.

[7] 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).