Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2019	Mar. 27, 2020	Jun. 30, 2019
Entity Information [Line Items]
Entity Central Index Key	0000020520
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 181,402,000
Entity Common Stock, Shares Outstanding		104,987,947
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Document Annual Report	true
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2019
Document Transition Report	false
Entity File Number	001-11001
Entity Registrant Name	FRONTIER COMMUNICATIONS CORP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	06-0619596
Entity Address, Address Line One	401 Merritt 7
Entity Address, City or Town	Norwalk
Entity Address, State or Province	CT
Entity Address, Postal Zip Code	06851
City Area Code	203
Local Phone Number	614-5600
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Documents Incorporated by Reference	Items 10, 11, 12, 13 and 14 of Part III will be incorporated by reference from a Form 10K/A to be filed with the Securities and Exchange Commission.
Common Stock [Member]
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.25 per share
Trading Symbol	FTR
Security Exchange Name	NASDAQ
Preferred Stock [Member]
Entity Information [Line Items]
Title of 12(b) Security	Preferred Stock Purchase Rights
Trading Symbol	N/A
Security Exchange Name	NASDAQ