Financial Statements of Guarantors (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended							9 Months Ended	12 Months Ended		9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2011 QCII	Dec. 31, 2012 QCII	Dec. 31, 2011 QSC and QCF	Dec. 31, 2012 QSC and QCF	Dec. 31, 2011 Subsidiaries Non-Guarantors	Dec. 31, 2012 Subsidiaries Non-Guarantors	Dec. 31, 2011 Eliminations	Dec. 31, 2012 Eliminations	Mar. 31, 2011 Predecessor	Dec. 31, 2010 Predecessor	Mar. 31, 2011 Predecessor QCII	Dec. 31, 2010 Predecessor QCII	Mar. 31, 2011 Predecessor QSC and QCF	Dec. 31, 2010 Predecessor QSC and QCF	Mar. 31, 2011 Predecessor Subsidiaries Non-Guarantors	Dec. 31, 2010 Predecessor Subsidiaries Non-Guarantors	Mar. 31, 2011 Predecessor Eliminations	Dec. 31, 2010 Predecessor Eliminations
OPERATING REVENUES
Operating revenues								$ 8,276	$ 10,889						$ 8,276	$ 10,889			$ 2,846	$ 11,730					$ 2,846	$ 11,730
Operating revenues-affiliates								51	467				20	4	76	467	(45)	(4)					2	(1)	9	24	(11)	(23)
Total operating revenues	2,856	2,825	2,835	2,840	2,793	2,765	2,769	8,327	11,356				20	4	8,352	11,356	(45)	(4)	2,846	11,730			2	(1)	2,855	11,754	(11)	(23)
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)								3,523	4,814					(4)	3,523	4,818			1,178	5,011					1,178	5,011
Selling, general and administrative								1,741	1,717		13	8	20	2	1,708	1,707			556	2,518	3	75	2	(2)	551	2,445
Operating expenses-affiliates								126	599						171	603	(45)	(4)							11	23	(11)	(23)
Depreciation and amortization								2,394	2,948		61	62			2,333	2,886			533	2,200					533	2,200
Total operating expenses								7,784	10,078		74	70	20	(2)	7,735	10,014	(45)	(4)	2,267	9,729	3	75	2	(2)	2,273	9,679	(11)	(23)
OPERATING (LOSS) INCOME	375	322	291	290	182	223	138	543	1,278		(74)	(70)		6	617	1,342			579	2,001	(3)	(75)		1	582	2,075
OTHER INCOME (EXPENSE)
Interest expense								(486)	(611)		(131)	(99)	(53)	(68)	(302)	(444)			(227)	(1,039)	(56)	(318)	(19)	(101)	(152)	(620)
Interest expense-affiliates									(144)		(12)	(91)	(68)	(110)	1	(50)	79	107			(1)	(1)	(26)	(292)	(1)		28	293
Interest income-affiliates													79				(79)						28	293			(28)	(293)
Net loss on early retirement of debt								(8)	(23)			27			(8)	(50)				(45)		(5)		(40)
Loss on embedded option in convertible debt																				(475)		(475)
Income (loss) from equity investments in subsidiaries											223	528	(79)	219			(144)	(747)			272	755	226	602			(498)	(1,357)
Other income (expense)								2	4		1		3	106	(2)	5		(107)	5	8			(1)	8	6
Total other income (expense)								(492)	(774)		81	365	(118)	147	(311)	(539)	(144)	(747)	(222)	(1,551)	215	(44)	208	470	(147)	(620)	(498)	(1,357)
INCOME BEFORE INCOME TAX EXPENSE								51	504		7	295	(118)	153	306	803	(144)	(747)	357	450	212	(119)	208	471	435	1,455	(498)	(1,357)
Income tax (benefit) expense	67	54	27	48	(1)	33		32	196	178	(12)	(13)	(335)	(375)	379	584			146	505	1	(64)	(64)	(284)	209	853
NET INCOME (LOSS)	111	83	37	77		32	(13)	19	308		19	308	217	528	(73)	219	(144)	(747)	211	(55)	211	(55)	272	755	226	602	(498)	(1,357)
COMPREHENSIVE INCOME								$ (427)	$ (64)		$ (427)	$ (64)	$ 217	$ 528	$ (73)	$ 219	$ (144)	$ (747)	$ 218	$ 58	$ 218	$ 62	$ 272	$ 755	$ 226	$ 598	$ (498)	$ (1,357)