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Interest rate stated in the contractual debt agreement.

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Long-Term Debt (Details 2) (USD $)	3 Months Ended		6 Months Ended			6 Months Ended	1 Months Ended			6 Months Ended			12 Months Ended			3 Months Ended		3 Months Ended	6 Months Ended	12 Months Ended					1 Months Ended	6 Months Ended	12 Months Ended				3 Months Ended				3 Months Ended			3 Months Ended		3 Months Ended					3 Months Ended					3 Months Ended			1 Months Ended
Long-Term Debt (Details 2) (USD $)	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010	Jun. 30, 2011 Company and its subsidiary, Level 3 Financing Inc. Senior Notes due 2019 (11.875%)	Mar. 31, 2011 Company and its subsidiary, Level 3 Financing Inc. Senior Notes due 2019 (9.375%)	Jun. 30, 2011 Company and its subsidiary, Level 3 Financing Inc. Senior Notes due 2019 (9.375%)	Mar. 04, 2011 Company and its subsidiary, Level 3 Financing Inc. Senior Notes due 2019 (9.375%)	Jun. 30, 2011 Level 3 Financing, Inc..	Jun. 30, 2010 Level 3 Financing, Inc..	Jun. 30, 2011 Level 3 Financing, Inc.. Senior Notes due 2019 (9.375%)	Mar. 31, 2018 Level 3 Financing, Inc.. Senior Notes due 2019 (9.375%)	Mar. 31, 2017 Level 3 Financing, Inc.. Senior Notes due 2019 (9.375%)	Mar. 31, 2016 Level 3 Financing, Inc.. Senior Notes due 2019 (9.375%)	Mar. 31, 2010 Level 3 Financing, Inc.. Senior Notes due 2018 (10.0%)	Jun. 30, 2011 Level 3 Financing, Inc.. Senior Notes due 2018 (10.0%)	Mar. 31, 2010 Level 3 Financing, Inc.. 12.25% Senior Notes	Jun. 30, 2011 Level 3 Escrow Senior Notes due 2019 (8.125%)	Mar. 31, 2018 Level 3 Escrow Senior Notes due 2019 (8.125%)	Mar. 31, 2017 Level 3 Escrow Senior Notes due 2019 (8.125%)	Mar. 31, 2016 Level 3 Escrow Senior Notes due 2019 (8.125%)	Jul. 31, 2011 Level 3 Escrow Senior Notes due 2019 (8.125%)	Jun. 30, 2011 Senior Notes due 2019 (8.125%)	Jan. 31, 2011 Senior Notes due 2019 (11.875%)	Jun. 30, 2011 Senior Notes due 2019 (11.875%)	Jan. 31, 2018 Senior Notes due 2019 (11.875%)	Jan. 31, 2017 Senior Notes due 2019 (11.875%)	Jan. 31, 2016 Senior Notes due 2019 (11.875%)	Jun. 30, 2011 Senior Notes due 2019 (9.375%)	Mar. 31, 2011 Convertible Senior Notes due 2011 (5.25%)	Mar. 31, 2010 Convertible Senior Notes due 2011 (5.25%)	Jun. 30, 2011 Convertible Senior Notes due 2011 (5.25%)	Dec. 31, 2010 Convertible Senior Notes due 2011 (5.25%)	Mar. 31, 2011 Convertible Senior Discount Notes due 2013 (9.0%)	Jun. 30, 2011 Convertible Senior Discount Notes due 2013 (9.0%)	Dec. 31, 2010 Convertible Senior Discount Notes due 2013 (9.0%)	Jun. 30, 2011 9.25% Senior Notes due 2014	Dec. 31, 2010 9.25% Senior Notes due 2014	Dec. 31, 2010 6.5% Convertible Senior Notes due in 2016	Sep. 30, 2010 6.5% Convertible Senior Notes due in 2016	Jun. 30, 2011 6.5% Convertible Senior Notes due in 2016	Jun. 30, 2011 Senior Notes due 2018 (10.0%)	Dec. 31, 2010 Senior Notes due 2018 (10.0%)	Sep. 30, 2010 2.875% Convertible Senior Notes due 2010	Mar. 31, 2010 2.875% Convertible Senior Notes due 2010	Mar. 31, 2010 6% Convertible Subordinated Notes due 2010	Mar. 31, 2010 10.75% Senior Notes due 2011	Jun. 30, 2011 10.75% Senior Notes due 2011	Jun. 30, 2010 10% Convertible Senior Notes due 2011	Mar. 31, 2011 Convertible Senior Notes (5.25%) and Convertible Senior Discount Notes (9.0%)	Mar. 31, 2010 Convertible Senior Notes (5.25%), Senior Notes (10.75%), and Convertible Senior Notes (2.875%)	Jul. 31, 2011 Convertible Senior Notes due 2013 (15.0%)	Jun. 30, 2011 Convertible Senior Notes due 2013 (15.0%)	Dec. 31, 2010 Convertible Senior Notes due 2013 (15.0%)
Long-term debt
Number of separate debt issuance transactions						2
Principal amount of notes									$ 500,000,000							$ 640,000,000		$ 550,000,000					$ 600,000,000		$ 605,000,000															$ 26,000,000	$ 175,000,000
Debt instrument issuance as a percentage of the face amount (as a percent)																			99.264%						98.173%
Net proceeds from issuance of notes after deducting debt issuance costs			766,000,000	613,000,000						474,000,000	613,000,000					613,000,000																								25,500,000	170,000,000
Discount on long-term debt	72,000,000		72,000,000		79,000,000				10,000,000							13,000,000			4,000,000					4,000,000		11,000,000				10,000,000				20,000,000				(4,000,000)	(7,000,000)				11,000,000	12,000,000
Interest rate on long term debt (as a percent)								9.375%									10.00%	12.25%					8.125%	8.125%	11.875%	11.875%				9.375%			5.25%			9.00%		9.25%				6.50%	10.00%		2.875%		6.00%		10.75%	10.00%				15.00%
Debt issuance costs																14,000,000									8,000,000					11,000,000											6,000,000
Maximum number of days following issuance of debt for declaration of registration statement to be declared effective (in days)							270																		270
Redemption price of debt instrument (as a percent)												100.00%	100.00%	102.344%	104.688%			106.125%	100.00%	100.00%	102.031%	104.063%				100.00%	100.00%	102.969%	105.938%		100.75%							104.625%
Debt instrument issuance price as a percentage of the principal amount (as a percent)												98.001%
Long-term debt retired in exchange transaction			295,000,000																																																		128,000,000
Maximum percentage of the principal amount of the debt instrument which the entity may redeem with the proceeds from certain equity offerings on or prior to April 1, 2014 (as a percent)												35.00%							35.00%							35.00%
Redemption price of the debt instrument if redeemed with the proceeds of certain equity offerings on or prior to April 1, 2014 (as a percent)												109.375%							108.125%							111.875%
Minimum number of private placement equity offerings necessary for proceeds to be used for debt redemption												1
Minimum aggregate gross proceeds received from equity offering necessary to be used for redemption of debt instrument												100,000,000							100,000,000							100,000,000
Minimum percentage of the principal amount of the debt instrument which must remain outstanding after the entity has redeemed a portion of the debt instrument with the proceeds from certain equity offerings on or prior to April 1, 2014 (as a percent)												65.00%							65.00%						65.00%
Maximum redemption period for the entity to redeem the debt instrument following the receipt of cash proceeds from certain equity offerings on or prior to April 1, 2014 (in number of days)												90							90							90
Minimum number of days' notice that the entity must provide for the redemption of the debt instrument (in number of days)												30							30							30
Maximum number of days' notice that the entity must provide for the redemption of the debt instrument (in number of days)												60							60							60
Principal amount of debt extinguished																		3,000,000													196,000,000	3,000,000			295,000,000			443,000,000								2,000,000		3,000,000		172,000,000
Loss on extinguishments of debt, net	23,000,000	5,000,000	43,000,000	59,000,000														55,000,000																				23,000,000												4,000,000	20,000,000
Debt repayments																																													38,000,000		111,000,000
Redemption price of debt instrument for each $1000 principal amount																		1,080																																1,016.70
Principal amount used for ratio of debt instrument redemption price																		1,000																																1,000
Portion of redemption price for each $1000 principal amount of debt instrument offered as consideration																		1,050
Portion of redemption price for each $1000 principal amount of debt instrument offered as a consent payment																		30
Principal amount of the holders which participated in the tender offer as a percentage of the debt instrument's aggregate principal amount outstanding (as a percent)																		99.40%
Principal amount of debt extinguished through tender offer																		547,000,000
Redemption price, low end of range (as a percent)																																																				95.00%
Redemption price, high end of range (as a percent)																																																				100.00%
Loss on repurchase of debt instrument, less than																																																				1,000,000
Future contractual maturities of long-term debt and capital leases (excluding issue discounts, premiums and fair value adjustments)
2011 (remaining six months)	2,000,000		2,000,000
2012	899,000,000		899,000,000
2013	406,000,000		406,000,000
2014	2,494,000,000		2,494,000,000
2015	832,000,000		832,000,000
2016	204,000,000		204,000,000
Thereafter	2,459,000,000		2,459,000,000
Total Debt Obligations	$ 7,296,000,000		$ 7,296,000,000		$ 6,527,000,000																			$ 600,000,000		$ 605,000,000				$ 500,000,000				$ 196,000,000			$ 295,000,000	$ 807,000,000	$ 1,250,000,000	$ 201,000,000		$ 201,000,000	$ 640,000,000	$ 640,000,000										$ 400,000,000	$ 400,000,000