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Stock Plans (Narrative) (Details) - USD ($)
4 Months Ended 8 Months Ended 12 Months Ended
Apr. 30, 2021
Dec. 31, 2021
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
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)     2,100,000    
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     $ 47,000,000    
Weighted average period over which unvested restricted stock awards unrecognized compensation cost is expected to be recognized (in years)     2 years    
Compensation expense $ (1,000,000) $ 12,000,000 $ (34,000,000)   $ 2,000,000
Non-Employee Directors’ Compensation Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Compensation expense     1,000,000 $ 1,000,000  
Cash compensation   $ 300,000 250,000 $ 300,000 $ 5,000,000
Unrecognized compensation cost     $ 150,000    
Performance Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Measurement period     3 years    
Performance metric percent     33.30%    
Compensation expense     $ 47,000,000    
Performance Stock [Member] | LTIP [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period     3 years    
Initial period over which target number of performance shares are awarded     90 days    
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%  
Maximum [Member] | Performance Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Payout range, percent of target units     200.00% 300.00%