Long-Term Debt (Schedule Of Outstanding Debt) (Details) (USD $) In Millions, unless otherwise specified				9 Months Ended						9 Months Ended
	Sep. 30, 2013 Combined Credit Agreements [Member]	Mar. 31, 2013 Combined Credit Agreements [Member]	Sep. 30, 2013 Senior Secured Second Lien Credit Facility [Member]	Sep. 30, 2013 Senior Notes Due 2015 [Member]	Sep. 30, 2013 Senior Notes Due 2016 [Member]	Sep. 30, 2013 Senior Notes Due 2019 [Member]	Sep. 30, 2013 Canadian Credit Facility [Member]	Sep. 30, 2013 Multiple Subsidiaries Set One [Member] U.S. Credit Facility [Member]	Sep. 30, 2013 Multiple Subsidiaries Set Two [Member] U.S. Credit Facility [Member]	Sep. 30, 2013 Maximum [Member] U.S. Credit Facility [Member]	Sep. 30, 2013 First Mortgage [Member] Combined Credit Agreements [Member]		Sep. 30, 2013 Second Lien Debt [Member] Senior Secured Second Lien Credit Facility [Member]		Sep. 30, 2013 Second Lien Debt [Member] Senior Secured Second Lien Term Loan Due 2019 [Member]		Sep. 30, 2013 Senior Notes [Member] Senior Notes Due 2015 [Member]		Sep. 30, 2013 Senior Notes [Member] Senior Notes Due 2016 [Member]		Sep. 30, 2013 Senior Notes [Member] Senior Notes Due 2019 [Member]		Sep. 30, 2013 Senior Notes [Member] Senior Notes Due 2021 [Member]		Sep. 30, 2013 Senior Subordinated Notes [Member]		Sep. 30, 2013 Libor [Member] Maximum [Member] Canadian Credit Facility [Member]	Sep. 30, 2013 Libor [Member] Minimum [Member] Canadian Credit Facility [Member]	Sep. 30, 2013 Libor [Member] Second Lien Debt [Member] Senior Secured Second Lien Credit Facility [Member]	Sep. 30, 2013 Libor [Member] Second Lien Debt [Member] Senior Secured Second Lien Term Loan Due 2019 [Member]	Sep. 30, 2013 ABR [Member] Second Lien Debt [Member] Senior Secured Second Lien Credit Facility [Member]	Sep. 30, 2013 CDOR Rate [Member] Maximum [Member] Canadian Credit Facility [Member]	Sep. 30, 2013 CDOR Rate [Member] Minimum [Member] Canadian Credit Facility [Member]	Sep. 30, 2013 LIBOR [Member] U.S. Credit Facility [Member]	Sep. 30, 2013 Canadian Prime Rate [Member] Maximum [Member] Canadian Credit Facility [Member]	Sep. 30, 2013 Canadian Prime Rate [Member] Minimum [Member] Canadian Credit Facility [Member]	Sep. 30, 2013 U.S. Prime Rate [Member] Maximum [Member] Canadian Credit Facility [Member]	Sep. 30, 2013 U.S. Prime Rate [Member] Minimum [Member] Canadian Credit Facility [Member]	Sep. 30, 2013 2013 [Member] Senior Notes [Member] Senior Notes Due 2015 [Member]	Sep. 30, 2013 2013 [Member] Senior Notes [Member] Senior Notes Due 2016 [Member]	Sep. 30, 2013 2013 [Member] Senior Subordinated Notes [Member]	Sep. 30, 2013 2014 [Member] Second Lien Debt [Member] Senior Secured Second Lien Credit Facility [Member]	Sep. 30, 2013 2014 [Member] Second Lien Debt [Member] Senior Secured Second Lien Term Loan Due 2019 [Member]	Sep. 30, 2013 2014 [Member] Senior Notes [Member] Senior Notes Due 2015 [Member]	Sep. 30, 2013 2014 [Member] Senior Notes [Member] Senior Notes Due 2016 [Member]	Sep. 30, 2013 2014 [Member] Senior Notes [Member] Senior Notes Due 2019 [Member]	Sep. 30, 2013 2014 [Member] Senior Subordinated Notes [Member]	Sep. 30, 2013 2015 [Member] Second Lien Debt [Member] Senior Secured Second Lien Credit Facility [Member]	Sep. 30, 2013 2015 [Member] Second Lien Debt [Member] Senior Secured Second Lien Term Loan Due 2019 [Member]	Sep. 30, 2013 2015 [Member] Senior Notes [Member] Senior Notes Due 2016 [Member]	Sep. 30, 2013 2015 [Member] Senior Notes [Member] Senior Notes Due 2019 [Member]	Sep. 30, 2013 2016 [Member] Senior Notes [Member] Senior Notes Due 2019 [Member]	Sep. 30, 2013 2017 [Member] Senior Notes [Member] Senior Notes Due 2019 [Member]	Sep. 30, 2013 2019 [Member] Senior Notes [Member] Senior Notes Due 2021 [Member]	Sep. 30, 2013 2020 [Member] Senior Notes [Member] Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument Year Of Maturity				2015	2016	2019
Line of Credit Facility, Current Borrowing Capacity	$ 350	$ 850									$ 350	[1],[2]
Principal amount													625	[2]	200	[2]	11		8		298		325		350
Scheduled maturity date											Sep. 06, 2016	[2],[3]	Jun. 21, 2019	[2],[3]	Jun. 21, 2019	[2],[3]	Aug. 01, 2015		Jan. 01, 2016		Aug. 15, 2019		Jul. 01, 2021		Apr. 01, 2016
Debt Instrument, Interest Rate, Stated Percentage											4.00%	[4]	7.00%	[2]	7.00%	[2]	8.25%		11.75%		9.125%		11.00%		7.125%
Base Interest Rate Options											LIBOR, ABR, CDOR	[2],[5],[6]	LIBOR floor of 1.25%; ABR floor of 2.25%	[2]	LIBOR floor of 1.25%	[2]	N/A		N/A		N/A		N/A		N/A
Financial covenants											- Minimum current ratio of 1.0 - Minimum EBITDA to cash interest expense ratio of 1.25 - Maximum senior secured debt leverage ratio of 2.0	[2],[7]	N/A	[2],[7]	N/A	[2],[7]	N/A	[7]	N/A	[7]	N/A	[7]	N/A	[7]	N/A	[7]
Significant restrictive covenants											- Incurrence of debt - Incurrence of liens - Payment of dividends - Equity purchases - Asset sales - Affiliate transactions - Limitations on derivatives and investments	[2],[7]	- Incurrence of debt - Incurrence of liens and 1st lien cap -Payment of dividends - Equity purchases - Asset sales - Affiliate transactions	[2],[7]	- Incurrence of debt - Incurrence of liens and 1st lien cap -Payment of dividends - Equity purchases - Asset sales - Affiliate transactions	[2],[7]	- Asset sales	[7]	- Asset sales	[7]	- Incurrence of debt - Incurrence of liens -Payment of dividends - Equity purchases - Asset sales - Affiliate transactions	[7]	- Incurrence of debt - Incurrence of liens -Payment of dividends - Equity purchases - Asset sales - Affiliate transactions	[7]	- Incurrence of debt - Incurrence of liens -Payment of dividends - Equity purchases - Asset sales - Affiliate transactions	[7]
Optional redemption											Any time	[2],[7]	Any time, subject to re-pricing event June 21, 2014: 102 2015: 101	[2],[7]	Any time, subject to re-pricing event June 21, 2014: 102 2015: 101	[2],[7]	August 1, 2013: 101.938 2014: par	[7]	July 1, 2013: 105.875 2014: 102.938 2015: par	[7]	August 15, 2014: 104.563 2015: 103.042 2016: 101.521 2017: par	[7]	July 1, 2019: 102.000 2020: par	[7]	April 1, 2013: 101.188 2014: par	[7]
Make-whole redemption											N/A	[2],[7]	N/A	[2],[7]	N/A	[2],[7]	N/A	[7]	N/A	[7]	Callable prior to August 15, 2014 at make-whole call price of Treasury +50 bps	[7]	Callable prior to July 1, 2019 at make-whole call price of Treasury +50 bps	[7]	N/A	[7]
Make-whole redemption																					0.50%		0.50%
Change of control											Event of default	[2],[7]	Put at 101% of principal plus accrued interest	[2],[7]	Put at 101% of principal plus accrued interest	[2],[7]	Put at 101% of principal plus accrued interest	[7]	Put at 101% of principal plus accrued interest	[7]	Put at 101% of principal plus accrued interest	[7]	Put at 101% of principal plus accrued interest	[7]	Put at 101% of principal plus accrued interest	[7]
Equity Clawback											N/A	[2],[7]	N/A	[2],[7]	N/A	[2],[7]	N/A	[7]	N/A	[7]	N/A	[7]	Redeemable until July 1, 2016 at 111.00%, plus accrued interest for up to 35%	[7]	N/A	[7]
Equity Clawback																							111.00%
Estimated fair value											149.7		600.0		192.0		10.1		8.3		271.6		307.1		332.9
Equity interests							100.00%	100.00%	65.00%
Credit Agreement Repayment Term Trigerring Event, Maximum Threshold For Measurement	$ 100		$ 100
Commitment fee percentage										1.75%
Current ratio											1.0
Minimum EBITDA to cash interest expense ratio											1.25
Senior secured debt leverage ratio											2.0
Redemption percentage of par value																																							101.938%	105.875%	101.188%	102.00%	102.00%	100.00%	102.938%	104.563%	100.00%	101.00%	101.00%	100.00%	103.042%	101.521%	100.00%	102.00%	100.00%
Debt Instrument, Reference Rate, Floor																													1.25%	1.25%	2.25%
Applicable margin in addition to interest rate										2.75%																	3.75%	2.75%				3.75%	2.75%	1.00%	2.75%	1.75%	2.75%	1.75%
Percentage of principal plus accrued interest for change of control													101.00%		101.00%		101.00%		101.00%		101.00%		101.00%		101.00%

[1] The principal amount for the Combined Credit Agreements represents the global borrowing base as of September 30, 2013.

[2] Borrowings under the Amended and Restated U.S. Credit Facility, Senior Secured Second Lien Credit Agreement and Senior Secured 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 Senior Secured Second Lien Credit Agreement and the Senior Secured 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 Senior Secured Second Lien Credit Agreement or the Senior Secured Second Lien Notes due 2019, if on the applicable date any amount of such debt remains outstanding. The Senior Secured Second Lien Credit Agreement and Senior Secured 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] Represents the weighted average borrowing rate payable to lenders.

[5] mounts 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] mounts 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%.

[7] 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.