Debt instrument maturity month and year.

No definition available.

Name:	ck0000716133_DebtInstrumentMaturityMonthAndYear
Namespace Prefix:	ck0000716133_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt instrument original maturity month and year.

+ References

No definition available.

+ Details

Name:	ck0000716133_DebtInstrumentOriginalMaturityMonthAndYear
Namespace Prefix:	ck0000716133_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt instrument updated maturity month and year.

+ References

No definition available.

+ Details

Name:	ck0000716133_DebtInstrumentUpdatedMaturityMonthAndYear
Namespace Prefix:	ck0000716133_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt instrument variable rate floor.

+ References

No definition available.

+ Details

Name:	ck0000716133_DebtInstrumentVariableRateFloor
Namespace Prefix:	ck0000716133_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Incremental term loans increase amount.

+ References

No definition available.

+ Details

Name:	ck0000716133_IncrementalTermLoansIncreaseAmount
Namespace Prefix:	ck0000716133_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the threshold for the Consolidated Total Leverage Ratio that triggers limitations to the company's levels of restricted payments.

+ References

No definition available.

+ Details

Name:	ck0000716133_LeverageRatioThreshold
Namespace Prefix:	ck0000716133_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line Of Credit Facility, Fronting Fee Percentage

+ References

No definition available.

+ Details

Name:	ck0000716133_LineOfCreditFacilityFrontingFeePercentage
Namespace Prefix:	ck0000716133_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Upsize to credit facility.

+ References

No definition available.

+ Details

Name:	ck0000716133_UpsizeToCreditFacility
Namespace Prefix:	ck0000716133_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI https://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69C
-URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69B
-URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612

+ Details

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

- Definition

The average effective interest rate during the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1F
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
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

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=126972273&loc=d3e12355-112629

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=126972273&loc=d3e12317-112629

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

+ Details

Name:	us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Definition

Amount of increase (decrease) of the credit facility.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(f))
-URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

Name:	us-gaap_LineOfCreditFacilityIncreaseDecreaseForPeriodNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (e)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585

+ Details

Name:	us-gaap_PaymentsOfDebtIssuanceCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=ck0000716133_RevolvingCreditFacilityDueTwoThousandTwentySixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=ck0000716133_OneMonthMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=ck0000716133_ThreeMonthsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=ck0000716133_SixMonthsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_BridgeLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ck0000716133_TermB1LoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ck0000716133_TermB2LoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ck0000716133_SeniorNotesDue2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ck0000716133_SeniorNotesDue2025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ck0000716133_FloorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_StandbyLettersOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt and Other Financing Arrangements - Credit Agreement - Narrative (Details) - USD ($)		1 Months Ended	3 Months Ended	4 Months Ended	8 Months Ended	12 Months Ended
	Sep. 07, 2021	Nov. 30, 2021	Dec. 31, 2021	Dec. 31, 2021	Sep. 07, 2021	Dec. 31, 2022	Dec. 31, 2020
Debt Instrument [Line Items]
Credit agreement term	5 years
Senior secured revolving credit facility	$ 275,000,000				$ 275,000,000
Payments of debt issuance costs				$ 55,900,000	800,000	$ 700,000	$ 700,000
Debt instrument, interest rate, stated percentage			7.25%	7.25%		7.25%
Debt instrument, interest rate during period						3.30%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage		0.50%
Line of Credit Facility, Commitment Fee Percentage		0.375%
Line Of Credit Facility, Fronting Fee Percentage		0.125%
Loss on extinguishment of debt			$ (2,100,000)	$ (2,100,000)	(10,700,000)	$ 0	$ 0
Revolving Credit Facility Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		2.00%
Debt instrument, interest rate during period		3.00%
Maximum [Member]
Debt Instrument [Line Items]
Leverage Ratio, threshold						3.25%
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Revolving Credit Facility Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.00%
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Minimum [Member] \| Revolving Credit Facility Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		2.75%
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Maximum [Member] \| Revolving Credit Facility Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		3.00%
One Month [Member] \| Revolving Credit Facility Due 2026 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		0.10%
Three Months \| Revolving Credit Facility Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		0.15%
Six Months [Member] \| Revolving Credit Facility Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		0.25%
Base Rate Loans [Member] \| Minimum [Member] \| Revolving Credit Facility Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.75%
Base Rate Loans [Member] \| Maximum [Member] \| Revolving Credit Facility Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		2.00%
Bridge Loan [Member]
Debt Instrument [Line Items]
Senior secured revolving credit facility	$ 10,000,000				10,000,000
Term B-1 Loans [Member]
Debt Instrument [Line Items]
Credit agreement term	7 years
Senior secured term loan facility	$ 150,000,000	$ 500,000,000.0			150,000,000
Debt instrument original maturity date	2028-09
Payments of debt issuance costs	$ 32,000,000.0	4,300,000
Incremental Term B-1 loans increase amount		$ 350,000,000.0
Debt instrument, interest rate, stated percentage		0.50%
Debt instrument updated maturity date		2028-11
Debt Instrument, Basis Spread on Variable Rate		2.50%
Debt instrument, interest rate during period		3.50%
Term B-1 Loans [Member] \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.00%
Debt instrument variable rate floor		0.25%
Term B-1 Loans [Member] \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		3.25%
Term B-1 Loans [Member] \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		3.50%
Term B-1 Loans [Member] \| One Month [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		0.10%
Term B-1 Loans [Member] \| Three Months
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		0.15%
Term B-1 Loans [Member] \| Six Months [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		0.25%
Term B-1 Loans [Member] \| Base Rate Loans [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		2.25%
Term B-1 Loans [Member] \| Base Rate Loans [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		2.50%
Term B-2 Loans [Member]
Debt Instrument [Line Items]
Senior secured term loan facility		$ 650,000,000.0
Debt instrument expiration date		2028-11
Payments of debt issuance costs		$ 9,700,000
Debt instrument, interest rate, stated percentage		0.50%
Debt Instrument, Basis Spread on Variable Rate		2.25%
Debt instrument, interest rate during period		3.25%
Term B-2 Loans [Member] \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.00%
Debt instrument variable rate floor		0.50%
Term B-2 Loans [Member] \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		3.00%
Term B-2 Loans [Member] \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		3.25%
Term B-2 Loans [Member] \| One Month [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		0.10%
Term B-2 Loans [Member] \| Three Months
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		0.15%
Term B-2 Loans [Member] \| Six Months [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		0.25%
Term B-2 Loans [Member] \| Base Rate Loans [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		2.00%
Term B-2 Loans [Member] \| Base Rate Loans [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		2.25%
Senior Notes due 2024 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		7.00%
Senior Notes due 2025 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		8.00%
Floor [Member] \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Revolving Credit Facility Due 2026 [Member]
Debt Instrument [Line Items]
Debt instrument variable rate floor		0.00%
Floor [Member] \| Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt instrument variable rate floor		0.00%
Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Senior secured revolving credit facility	$ 40,000,000				$ 40,000,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument expiration date	2026-09
Payments of debt issuance costs	$ 6,100,000	$ 1,300,000
Upsize to the revolving credit facility		125,000,000.0
Total commitments under the Revolving Credit Facility increased amount		$ 400,000,000.0
Borrowings under the revolving credit facility						$ 223,000,000.0
Line of credit facility, remaining borrowing capacity						$ 177,000,000.0