Document And Entity Information (USD $)	12 Months Ended
	Dec. 31, 2013	Jun. 30, 2013	Feb. 14, 2014 Class A Common Stock [Member]	Feb. 14, 2014 Class B Common Stock [Member]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	FY
Entity Registrant Name	LEXMARK INTERNATIONAL INC /KY/
Entity Central Index Key	0001001288
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding			61,565,124	0
Entity Well-known Seasoned Issuer	Yes
Entity Public Float		$ 1,900,000,000
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No