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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Stock Plans (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
Stock Plans (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Frontier Communications Parent, Inc. 2021 Management Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant under the plan (in shares)	15,600,000
Emergence LTI Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant under the plan (in shares)	4,309,000
2017 EIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant under the plan (in shares)	0
Plan authorization period	10 years
Vesting period	4 years
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Remaining unrecognized compensation cost associated with unvested restricted stock awards	$ 36,000
Weighted average period over which unvested restricted stock awards unrecognized compensation cost is expected to be recognized (in years)	1 year
Compensation expense	$ 38,000	$ 34,000
Non-Employee Directors’ Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	1,000	1,000	$ 1,000
Cash compensation	250		$ 300,000,000
Unrecognized compensation cost	$ 150
Performance Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Measurement period	3 years
Performance metric percent	33.30%
Conversion of stock, ratio	1
Compensation expense	$ 69,000	$ 47,000
Minimum [Member] \| Performance Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout range, percent of target units	0.00%	0.00%
Minimum [Member] \| Performance Stock [Member] \| PSUs 2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout range, percent of target units	0.00%
Maximum [Member] \| Performance Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout range, percent of target units	200.00%	200.00%
Maximum [Member] \| Performance Stock [Member] \| PSUs 2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout range, percent of target units	300.00%