Financial Statements Of Guarantors (Condensed Consolidating Statements Of Income) (Details) (USD $) In Millions	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		9 Months Ended	3 Months Ended				9 Months Ended		3 Months Ended				9 Months Ended		3 Months Ended		9 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2011 Successor [Member]	Sep. 30, 2011 Successor [Member]	Sep. 30, 2011 Successor [Member] Qwest Communications International Inc. [Member]		Sep. 30, 2011 Successor [Member] Qwest Communications International Inc. [Member]		Sep. 30, 2011 Successor [Member] Qwest Services Corporation and Qwest Capital Funding, Inc. [Member]		Sep. 30, 2011 Successor [Member] Qwest Services Corporation and Qwest Capital Funding, Inc. [Member]		Sep. 30, 2011 Successor [Member] Subsidiary Non-Guarantors [Member]	Sep. 30, 2011 Successor [Member] Subsidiary Non-Guarantors [Member]	Sep. 30, 2011 Successor [Member] Eliminations [Member]	Sep. 30, 2011 Successor [Member] Eliminations [Member]	Mar. 31, 2011 Predecessor [Member]	Sep. 30, 2010 Predecessor [Member]	Sep. 30, 2010 Predecessor [Member]	Mar. 31, 2011 Predecessor [Member] Qwest Communications International Inc. [Member]		Sep. 30, 2010 Predecessor [Member] Qwest Communications International Inc. [Member]		Sep. 30, 2010 Predecessor [Member] Qwest Communications International Inc. [Member]		Mar. 31, 2011 Predecessor [Member] Qwest Services Corporation and Qwest Capital Funding, Inc. [Member]		Sep. 30, 2010 Predecessor [Member] Qwest Services Corporation and Qwest Capital Funding, Inc. [Member]		Sep. 30, 2010 Predecessor [Member] Qwest Services Corporation and Qwest Capital Funding, Inc. [Member]		Mar. 31, 2011 Predecessor [Member] Subsidiary Non-Guarantors [Member]	Sep. 30, 2010 Predecessor [Member] Subsidiary Non-Guarantors [Member]	Sep. 30, 2010 Predecessor [Member] Subsidiary Non-Guarantors [Member]	Mar. 31, 2011 Predecessor [Member] Eliminations [Member]	Sep. 30, 2010 Predecessor [Member] Eliminations [Member]	Sep. 30, 2010 Predecessor [Member] Eliminations [Member]
OPERATING REVENUES
Operating revenues	$ 2,744	$ 5,507									$ 2,744	$ 5,507			$ 2,846	$ 2,935	$ 8,831													$ 2,846	$ 2,935	$ 8,831
Operating revenues-affiliates	21	27					2	[1],[2]	5	[1],[2]	29	44	(10)	(22)										2	[1],[2]			2	[1],[2]	9	8	16	(11)	(8)	(18)
Total operating revenues	2,765	5,534					2	[1],[2]	5	[1],[2]	2,773	5,551	(10)	(22)	2,846	2,935	8,831							2	[1],[2]			2	[1],[2]	2,855	2,943	8,847	(11)	(8)	(18)
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	1,185	2,326									1,185	2,326			1,178	1,286	3,773													1,178	1,286	3,773
Selling, general and administrative	525	1,181	3	[3]	8	[3]	2	[1],[2]	5	[1],[2]	520	1,168			556	600	1,839	3	[3]	9	[3]	48	[3]	2	[1],[2]	1	[1],[2]	2	[1],[2]	551	590	1,789
Operating expenses-affiliates	36	68									46	90	(10)	(22)																11	8	18	(11)	(8)	(18)
Depreciation and amortization	796	1,598	20	[3]	42	[3]					776	1,556			533	552	1,645													533	552	1,645
Total operating expenses	2,542	5,173	23	[3]	50	[3]	2	[1],[2]	5	[1],[2]	2,527	5,140	(10)	(22)	2,267	2,438	7,257	3	[3]	9	[3]	48	[3]	2	[1],[2]	1	[1],[2]	2	[1],[2]	2,273	2,436	7,225	(11)	(8)	(18)
OPERATING INCOME	223	361	(23)	[3]	(50)	[3]					246	411			579	497	1,574	(3)	[3]	(9)	[3]	(48)	[3]			(1)	[1],[2]			582	507	1,622
OTHER INCOME (EXPENSE)
Interest expense	(158)	(308)	(43)	[3]	(87)	[3]	(17)	[1],[2]	(35)	[1],[2]	(98)	(186)			(227)	(255)	(799)	(56)	[3]	(82)	[3]	(250)	[3]	(19)	[1],[2]	(22)	[1],[2]	(80)	[1],[2]	(152)	(151)	(469)
Interest expense-affiliates			(4)	[3]	(8)	[3]	(22)	[1],[2]	(45)	[1],[2]		1	26	52				(1)	[3]					(26)	[1],[2]	(71)	[1],[2]	(226)	[1],[2]	(1)			28	71	226
Interest income-affiliates							26	[1],[2]	52	[1],[2]			(26)	(52)										28	[1],[2]	71	[1],[2]	226	[1],[2]				(28)	(71)	(226)
Loss on early retirement of debt		(1)										(1)				(3)	(45)			(3)	[3]	(5)	[3]					(40)	[1],[2]
Loss on embedded option in convertible debt																(229)	(208)			(229)	[3]	(208)	[3]
Income from equity investments in subsidiaries			90	[3]	157	[3]	18	[1],[2]	(34)	[1],[2]			(108)	(123)				272	[3]	214	[3]	580	[3]	226	[1],[2]	159	[1],[2]	494	[1],[2]				(498)	(373)	(1,074)
Other (expense) income, net			(1)	[3]	(1)	[3]	(1)	[1],[2]	(1)	[1],[2]	2	2			5	8	9							(1)	[1],[2]	6	[1],[2]	7	[1],[2]	6	2	2
Total other income (expense)	(158)	(309)	42	[3]	61	[3]	4	[1],[2]	(63)	[1],[2]	(96)	(184)	(108)	(123)	(222)	(479)	(1,043)	215	[3]	(100)	[3]	117	[3]	208	[1],[2]	143	[1],[2]	381	[1],[2]	(147)	(149)	(467)	(498)	(373)	(1,074)
INCOME BEFORE INCOME TAX EXPENSE	65	52	19	[3]	11	[3]	4	[1],[2]	(63)	[1],[2]	150	227	(108)	(123)	357	18	531	212	[3]	(109)	[3]	69	[3]	208	[1],[2]	142	[1],[2]	381	[1],[2]	435	358	1,155	(498)	(373)	(1,074)
Income tax expense	33	33	(13)	[3]	(8)	[3]	(84)	[1],[2]	(215)	[1],[2]	130	256			146	108	425	1	[3]	(19)	[3]	(37)	[3]	(64)	[1],[2]	(72)	[1],[2]	(203)	[1],[2]	209	199	665
NET INCOME (LOSS)	$ 32	$ 19	$ 32	[3]	$ 19	[3]	$ 88	[1],[2]	$ 152	[1],[2]	$ 20	$ (29)	$ (108)	$ (123)	$ 211	$ (90)	$ 106	$ 211	[3]	$ (90)	[3]	$ 106	[3]	$ 272	[1],[2]	$ 214	[1],[2]	$ 584	[1],[2]	$ 226	$ 159	$ 490	$ (498)	$ (373)	$ (1,074)

[1] QCF is the issuer of the QCF Guaranteed Notes and is a guarantor of the QCII Guaranteed Notes.

[2] QSC is a guarantor of the QCII Guaranteed Notes.

[3] QCII is the issuer of the QCII Guaranteed Notes and is a guarantor of the QCF Guaranteed Notes.