Financial Statements of Guarantors (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended	3 Months Ended		6 Months Ended	3 Months Ended		6 Months Ended	3 Months Ended		6 Months Ended	3 Months Ended		6 Months Ended	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2012 QCII	Jun. 30, 2011 QCII	Jun. 30, 2012 QCII	Jun. 30, 2012 QSC and QCF	Jun. 30, 2011 QSC and QCF	Jun. 30, 2012 QSC and QCF	Jun. 30, 2012 Subsidiaries Non-Guarantors	Jun. 30, 2011 Subsidiaries Non-Guarantors	Jun. 30, 2012 Subsidiaries Non-Guarantors	Jun. 30, 2012 Eliminations	Jun. 30, 2011 Eliminations	Jun. 30, 2012 Eliminations	Mar. 31, 2011 Predecessor	Mar. 31, 2011 Predecessor QCII	Mar. 31, 2011 Predecessor QSC and QCF	Mar. 31, 2011 Predecessor Subsidiaries Non-Guarantors	Mar. 31, 2011 Predecessor Eliminations
OPERATING REVENUES
Operating revenues	$ 2,736	$ 2,763	$ 5,461							$ 2,736	$ 2,763	$ 5,461				$ 2,846			$ 2,846
Operating revenues-affiliates	100	6	214				1	3	3	100	15	214	(1)	(12)	(3)			2	9	(11)
Total operating revenues	2,836	2,769	5,675				1	3	3	2,836	2,778	5,675	(1)	(12)	(3)	2,846		2	2,855	(11)
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	1,213	1,141	2,388							1,213	1,141	2,388				1,178			1,178
Selling, general and administrative	444	656	928	1	5	3	1	3	3	442	648	922				556	3	2	551
Operating expenses-affiliates	150	32	299							151	44	302	(1)	(12)	(3)				11	(11)
Depreciation and amortization	738	802	1,479	16	22	34				722	780	1,445				533			533
Total operating expenses	2,545	2,631	5,094	17	27	37	1	3	3	2,528	2,613	5,057	(1)	(12)	(3)	2,267	3	2	2,273	(11)
OPERATING (LOSS) INCOME	291	138	581	(17)	(27)	(37)				308	165	618				579	(3)		582
OTHER INCOME (EXPENSE)
Interest expense	(154)	(150)	(324)	(25)	(44)	(64)	(16)	(18)	(34)	(113)	(88)	(226)				(227)	(56)	(19)	(152)
Interest expense-affiliates	(30)		(34)	(21)	(4)	(22)	(28)	(23)	(54)	(8)	1	(11)	27	26	53		(1)	(26)	(1)	28
Interest income-affiliates							27	26	53				(27)	(26)	(53)			28		(28)
Income (loss) from equity investments in subsidiaries				91	67	217	15	(52)	60				(106)	(15)	(277)		272	226		(498)
Net loss on early retirement of debt	(45)	(1)	(37)							(45)	(1)	(37)
Other income	2		3	5		13				(3)		(10)				5		(1)	6
Total other income (expense)	(227)	(151)	(392)	50	19	144	(2)	(67)	25	(169)	(88)	(284)	(106)	(15)	(277)	(222)	215	208	(147)	(498)
INCOME (LOSS) BEFORE INCOME TAX EXPENSE	64	(13)	189	33	(8)	107	(2)	(67)	25	139	77	334	(106)	(15)	(277)	357	212	208	435	(498)
Income tax expense	27		75	(4)	5	(7)	(93)	(131)	(192)	124	126	274				146	1	(64)	209
NET INCOME (LOSS)	37	(13)	114	37	(13)	114	91	64	217	15	(49)	60	(106)	(15)	(277)	211	211	272	226	(498)
COMPREHENSIVE INCOME	$ 37	$ (13)	$ 114	$ 37	$ (13)	$ 114	$ 91	$ 64	$ 217	$ 15	$ (49)	$ 60	$ (106)	$ (15)	$ (277)	$ 218	$ 218	$ 272	$ 226	$ (498)