Line of Credit Facility, Accordion Feature, Increase Limit

No definition available.

Name:	cnr_LineOfCreditFacilityAccordionFeatureIncreaseLimit
Namespace Prefix:	cnr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

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+ Details

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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

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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.

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+ Details

Name:	us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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

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+ Details

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

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

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Balance Type:	debit
Period Type:	duration

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cnr_ABLFILOFacilityMember
Namespace Prefix:
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Balance Type:
Period Type:

Debt - Short-Term Borrowings and Merger Transaction (Narrative) (Details) - USD ($)			1 Months Ended
	Mar. 14, 2025	Jul. 25, 2022	Jan. 31, 2025	Dec. 31, 2024	May 15, 2024	Apr. 12, 2018
Line of Credit Facility [Line Items]
Proceeds from lines of credit		$ 1,000,000,000.0
8.750% Senior Secured Notes due August 2028
Line of Credit Facility [Line Items]
Debt instrument, interest rate, stated percentage		8.75%		8.75%
8.750% Senior Secured Notes due August 2028 \| Senior Notes
Line of Credit Facility [Line Items]
Aggregate principal amount		$ 710,000,000
Debt instrument, interest rate, stated percentage		8.75%
Secured Debt \| Side Car Term Loan Facility \| Line of Credit
Line of Credit Facility [Line Items]
Aggregate principal amount		$ 300,000,000.0
Borrowings \| ABL Credit Agreement \| Line of Credit
Line of Credit Facility [Line Items]
Available credit facility amount		611,000,000.0
Borrowings \| ABL Facility \| Subsequent Event
Line of Credit Facility [Line Items]
Amounts drawn on facility	$ 80,000,000.0		$ 90,000,000.0
Borrowings \| ABL Facility \| Line of Credit
Line of Credit Facility [Line Items]
Available credit facility amount		850,000,000.0			$ 945,000,000.0	$ 850,000,000.0
Borrowings \| ABL FILO Facility \| Line of Credit
Line of Credit Facility [Line Items]
Accordion feature, increase limit		$ 95,000,000.0				$ 95,000,000.0