Document And Entity Information (USD $)	12 Months Ended
	Dec. 31, 2011	Jun. 30, 2011	Feb. 17, 2012 Voting Common Stock [Member]	Feb. 17, 2012 Non-Voting Common Stock [Member]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	FY
Entity Registrant Name	LORAL SPACE & COMMUNICATIONS INC.
Entity Central Index Key	0001006269
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding			21,092,278	9,505,673
Entity Well-known Seasoned Issuer	No
Entity Public Float		$ 866,457,211
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No