Financial Statements of Guarantors (Condensed Consolidating Statements of Cash Flows) (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
	Jun. 30, 2011 Successor [Member]	Jun. 30, 2011 Successor [Member] Qwest Services Corporation and Qwest Capital Funding, Inc. [Member]		Jun. 30, 2011 Successor [Member] Subsidiary Non-Guarantors [Member]	Jun. 30, 2011 Successor [Member] Eliminations [Member]	Mar. 31, 2011 Predecessor [Member]	Jun. 30, 2010 Predecessor [Member]	Mar. 31, 2011 Predecessor [Member] Qwest Communications International Inc. [Member]		Jun. 30, 2010 Predecessor [Member] Qwest Communications International Inc. [Member]		Mar. 31, 2011 Predecessor [Member] Qwest Services Corporation and Qwest Capital Funding, Inc. [Member]		Jun. 30, 2010 Predecessor [Member] Qwest Services Corporation and Qwest Capital Funding, Inc. [Member]		Mar. 31, 2011 Predecessor [Member] Subsidiary Non-Guarantors [Member]	Jun. 30, 2010 Predecessor [Member] Subsidiary Non-Guarantors [Member]	Mar. 31, 2011 Predecessor [Member] Eliminations [Member]	Jun. 30, 2010 Predecessor [Member] Eliminations [Member]
Net cash provided by (used in) operating activities	$ 700	$ 213	[1],[2]	$ 563		$ 777	$ 1,641	$ 7	[3]	$ (140)	[3]	$ (62)	[1],[2]	$ 421	[1],[2]	$ 828	$ 1,333	$ 4	$ 27
INVESTING ACTIVITIES
Payments for property, plant and equipment and capitalized software	(347)			(347)		(410)	(717)									(410)	(717)
Proceeds from sales or maturities of investment securities							159							159	[1],[2]
Purchases of investment securities							(821)							(821)	[1],[2]
Changes in interest in investments managed by QSC										(15)	[3]	(3)	[1],[2]	187	[1],[2]	3	(172)
Cash infusion to subsidiaries		(168)	[1],[2]		168							(191)	[1],[2]	(321)	[1],[2]			191	321
Changes in short-term affiliate loans	(511)	(243)	[1],[2]	(272)	4							180	[1],[2]	923	[1],[2]	1	16	(181)	(939)
Dividends received from subsidiaries		120	[1],[2]		(120)							590	[1],[2]	1,150	[1],[2]			(590)	(1,150)
Other, net	2			2		2										2
Net cash used in investing activities	(856)	(291)	[1],[2]	(617)	52	(408)	(1,379)			(15)	[3]	576	[1],[2]	1,277	[1],[2]	(404)	(873)	(580)	(1,768)
FINANCING ACTIVITIES
Payments of long-term debt	(851)			(851)		(203)	(2,005)			(525)	[3]	(179)	[1],[2]	(960)	[1],[2]	(24)	(520)
Net proceeds from issuance of long-term debt	643			643			775			775	[3]
Net proceeds from (repayments of) short-term affiliate debt		(72)	[1],[2]		(4)			119	[3]	(16)	[3]	(300)	[1],[2]	(923)	[1],[2]			181	939
Proceeds from issuances of common stock						14	17	14	[3]	17	[3]
Dividends paid						(141)	(277)	(141)	[3]	(277)	[3]
Cash infusion from parent				168	(168)											191	321	(191)	(321)
Dividends paid to parent				(120)	120											(590)	(1,150)	590	1,150
Early retirement of debt costs	(13)			(13)			(40)							(40)	[1],[2]
Other						13	(20)	1	[3]	20	[3]					16	(13)	(4)	(27)
Net cash used in financing activities	(221)	(72)	[1],[2]	(173)	(52)	(317)	(1,550)	(7)	[3]	(6)	[3]	(479)	[1],[2]	(1,923)	[1],[2]	(407)	(1,362)	576	1,741
Cash and cash equivalents:
Net (decrease) increase in cash and cash equivalents	(377)	(150)	[1],[2]	(227)		52	(1,288)			(161)	[3]	35	[1],[2]	(225)	[1],[2]	17	(902)
Cash and cash equivalents at beginning of period	424	183	[1],[2]	241		372	2,406			194	[3]	148	[1],[2]	987	[1],[2]	224	1,225
Cash and cash equivalents at end of period	$ 47	$ 33	[1],[2]	$ 14		$ 424	$ 1,118			$ 33	[3]	$ 183	[1],[2]	$ 762	[1],[2]	$ 241	$ 323

[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.