Fresh Start Accounting [Abstract]

No definition available.

Name:	fybr_FreshStartAccountingAbstract
Namespace Prefix:	fybr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Postconfirmation Current Liabilities Excluding Debt, Finance Leases, And Non Operating Liabilities

+ References

No definition available.

+ Details

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

- Definition

Postconfirmation Noncurrent Liabilities Excluding Debt, Finance Leases, And Deferred Tax Liability

+ References

No definition available.

+ Details

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

- Definition

Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 24
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3521-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3044-108585

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 8
-URI https://asc.fasb.org/extlink&oid=126999549&loc=SL98516268-108586

+ Details

Name:	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount attributed to the reconstituted entity, as well as the expected net realizable value of those assets that will be disposed before reconstitution occurs.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=84165509&loc=d3e56239-112766

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
-Paragraph 6
-URI https://asc.fasb.org/extlink&oid=84165509&loc=d3e56270-112766

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=124433192&loc=SL2890621-112765

+ Details

Name:	us-gaap_ReorganizationValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of reorganization value related to present value of discounted cash flows of the emerging entity. Reorganization value is the amount attributed to the reconstituted entity, as well as the expected net realizable value of those assets that will be disposed before reconstitution occurs.

+ References

+ Details

Name:	us-gaap_ReorganizationValuePresentValueOfDiscountedCashFlowsOfEmergingEntity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Fresh Start Accounting (Reconciliation Of Enterprise Value To Reorganization Value ) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Apr. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Fresh Start Accounting [Abstract]
Enterprise value		$ 12,500	$ 12,500
Plus: Cash and cash equivalents and restricted cash	$ 322	$ 2,178	940	$ 1,887	$ 810
Plus: Current liabilities (excluding debt, finance leases, and non-operating liabilities)			1,179
Plus: Long term liabilities (excluding debt, finance leases, deferred tax liability)			307
Reorganization value			$ 14,926