Liabilities Subject To Compromise Debt

No definition available.

Name:	fybr_LiabilitiesSubjectToCompromiseDebt
Namespace Prefix:	fybr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
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+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

+ References

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+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Long-Term Debt (Schedule Of Secured And Unsecured Debt) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	May 12, 2022	Dec. 31, 2020
Debt Instrument [Line Items]
Weighted average interest rate	6.76%	5.702%
Debt prior to reclassification to liabilities subject to compromise				$ 10,949
Principal outstanding	$ 8,963	$ 7,777
First Lien Notes Due 5/15/2030 [Member]
Debt Instrument [Line Items]
Interest rate			8.75%
Secured Debt [Member]
Debt Instrument [Line Items]
Principal outstanding	$ 8,113	$ 6,927
Secured Debt [Member] \| Term Loan Due 10/8/2027 [Member]
Debt Instrument [Line Items]
Maturity date	Oct. 08, 2027	Oct. 08, 2027
Principal outstanding	$ 1,450	$ 1,464
Interest rate	8.50%	4.50%
Secured Debt [Member] \| First Lien Notes Due 10/15/2027 [Member]
Debt Instrument [Line Items]
Maturity date	Oct. 15, 2027	Oct. 15, 2027
Principal outstanding	$ 1,150	$ 1,150
Interest rate	5.875%	5.875%
Secured Debt [Member] \| First Lien Notes Due 5/1/2028 [Member]
Debt Instrument [Line Items]
Maturity date	May 01, 2028	May 01, 2028
Principal outstanding	$ 1,550	$ 1,550
Interest rate	5.00%	5.00%
Secured Debt [Member] \| First Lien Notes Due 5/15/2030 [Member]
Debt Instrument [Line Items]
Maturity date	May 15, 2030
Principal outstanding	$ 1,200
Interest rate	8.75%
Secured Debt [Member] \| Second Lien Notes Due 5/1/2029 [Member]
Debt Instrument [Line Items]
Maturity date	May 01, 2029	May 01, 2029
Principal outstanding	$ 1,000	$ 1,000
Interest rate	6.75%	6.75%
Secured Debt [Member] \| Second Lien Notes Due 11/1/2029 [Member]
Debt Instrument [Line Items]
Maturity date	Nov. 01, 2029	Nov. 01, 2029
Principal outstanding	$ 750	$ 750
Interest rate	5.875%	5.875%
Secured Debt [Member] \| Second Lien Notes Due 1/15/2030 [Member]
Debt Instrument [Line Items]
Maturity date	Jan. 15, 2030
Principal outstanding	$ 1,000	$ 1,000
Interest rate	6.00%	6.00%
Secured Debt [Member] \| IDRB Due 5/1/2030 [Member]
Debt Instrument [Line Items]
Maturity date	May 01, 2030	May 01, 2030
Principal outstanding	$ 13	$ 13
Interest rate	6.20%	6.20%
Secured Subsidiary Debt [Member]
Debt Instrument [Line Items]
Principal outstanding	$ 100	$ 100
Secured Subsidiary Debt [Member] \| Debentures Due 11/15/2031 [Member]
Debt Instrument [Line Items]
Maturity date	Nov. 15, 2031	Nov. 15, 2031
Principal outstanding	$ 100	$ 100
Interest rate	8.50%	8.50%
Unsecured Subsidiary Debt [Member]
Debt Instrument [Line Items]
Principal outstanding	$ 750	$ 750
Unsecured Subsidiary Debt [Member] \| Debentures Due 5/15/2027 [Member]
Debt Instrument [Line Items]
Maturity date	May 15, 2027	May 15, 2027
Principal outstanding	$ 200	$ 200
Interest rate	6.75%	6.75%
Unsecured Subsidiary Debt [Member] \| Debentures Due 2/1/2028 [Member]
Debt Instrument [Line Items]
Maturity date	Feb. 01, 2028	Feb. 01, 2028
Principal outstanding	$ 300	$ 300
Interest rate	6.86%	6.86%
Unsecured Subsidiary Debt [Member] \| Debentures Due 2/15/2028 [Member]
Debt Instrument [Line Items]
Maturity date	Feb. 15, 2028	Feb. 15, 2028
Principal outstanding	$ 200	$ 200
Interest rate	6.73%	6.73%
Unsecured Subsidiary Debt [Member] \| Debentures Due 10/15/2029 [Member]
Debt Instrument [Line Items]
Maturity date	Oct. 15, 2029	Oct. 15, 2029
Principal outstanding	$ 50	$ 50
Interest rate	8.40%	8.40%