Condensed Consolidating Financial Information (Details 3) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010	Dec. 31, 2009
Current Assets:
Cash and cash equivalents	$ 584	$ 616	$ 442	$ 836
Restricted cash and securities	632	2
Receivable, net	294	264
Other	112	90
Total Current Assets	1,622	972
Property, Plant and Equipment, net	5,228	5,302
Restricted Cash and Securities	120	120
Goodwill and Other Intangibles, net	1,752	1,798
Other Assets, net	140	163
Total Assets	8,862	8,355
Current Liabilities:
Accounts payable	336	329
Current portion of long-term debt	875	180
Accrued payroll and employee benefits	65	84
Accrued interest	169	146
Current portion of deferred revenue	144	151
Other	83	66
Total Current Liabilities	1,672	956
Long-Term Debt, less current portion	6,349	6,268
Deferred Revenue, less current portion	745	736
Other Liabilities	528	552
Stockholders' Equity (Deficit)	(432)	(157)
Total Liabilities and Stockholders' Deficit	8,862	8,355
Commitments and Contingencies
Level 3 Communications, Inc.
Current Assets:
Cash and cash equivalents	156	173	1	236
Due from (to) affiliates	12,402	11,927
Other	4	4
Total Current Assets	12,562	12,104
Restricted Cash and Securities	18	18
Investment in Subsidiaries	(11,024)	(10,437)
Other Assets, net	15	9
Total Assets	1,571	1,694
Current Liabilities:
Accounts payable	1	1
Current portion of long-term debt	275	176
Accrued interest	59	47
Total Current Liabilities	335	224
Long-Term Debt, less current portion	1,652	1,612
Other Liabilities	16	15
Stockholders' Equity (Deficit)	(432)	(157)
Total Liabilities and Stockholders' Deficit	1,571	1,694
Level 3 Financing, Inc..
Current Assets:
Cash and cash equivalents	7	7	7	8
Due from (to) affiliates	12,013	11,424
Other	13	10
Total Current Assets	12,033	11,441
Investment in Subsidiaries	(18,289)	(17,176)
Other Assets, net	45	65
Total Assets	(6,211)	(5,670)
Current Liabilities:
Accrued interest	106	99
Other	1	1
Total Current Liabilities	107	100
Long-Term Debt, less current portion	4,609	4,564
Other Liabilities	101	107
Stockholders' Equity (Deficit)	(11,028)	(10,441)
Total Liabilities and Stockholders' Deficit	(6,211)	(5,670)
Level 3 Communications, LLC
Current Assets:
Cash and cash equivalents	350	350	348	431
Restricted cash and securities	1	1
Receivable, net	74	46
Due from (to) affiliates	(26,838)	(26,093)
Other	61	41
Total Current Assets	(26,352)	(25,655)
Property, Plant and Equipment, net	2,861	2,937
Restricted Cash and Securities	21	21
Goodwill and Other Intangibles, net	512	543
Investment in Subsidiaries	3,366	3,575
Other Assets, net	7	6
Total Assets	(19,585)	(18,573)
Current Liabilities:
Accounts payable	52	57
Current portion of long-term debt	2	2
Accrued payroll and employee benefits	59	78
Current portion of deferred revenue	111	115
Other	52	65
Total Current Liabilities	276	317
Long-Term Debt, less current portion	23	24
Deferred Revenue, less current portion	682	673
Other Liabilities	149	154
Stockholders' Equity (Deficit)	(20,715)	(19,741)
Total Liabilities and Stockholders' Deficit	(19,585)	(18,573)
Other Non-Guarantor Subsidiaries
Current Assets:
Cash and cash equivalents	71	86	86	161
Restricted cash and securities	631	1
Receivable, net	220	218
Due from (to) affiliates	2,423	2,742
Other	34	35
Total Current Assets	3,379	3,082
Property, Plant and Equipment, net	2,367	2,365
Restricted Cash and Securities	81	81
Goodwill and Other Intangibles, net	1,240	1,255
Other Assets, net	73	83
Total Assets	7,140	6,866
Current Liabilities:
Accounts payable	283	271
Current portion of long-term debt	598	2
Accrued payroll and employee benefits	6	6
Accrued interest	4
Current portion of deferred revenue	33	36
Other	30
Total Current Liabilities	954	315
Long-Term Debt, less current portion	65	68
Deferred Revenue, less current portion	63	63
Other Liabilities	262	276
Stockholders' Equity (Deficit)	5,796	6,144
Total Liabilities and Stockholders' Deficit	7,140	6,866
Eliminations
Current Assets:
Investment in Subsidiaries	25,947	24,038
Total Assets	25,947	24,038
Current Liabilities:
Stockholders' Equity (Deficit)	25,947	24,038
Total Liabilities and Stockholders' Deficit	$ 25,947	$ 24,038