Debt Instrument, Basis Spread On Variable Rate, Floor

No definition available.

Name:	cnr_DebtInstrumentBasisSpreadOnVariableRateFloor
Namespace Prefix:	cnr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Covenant Compliance, Excess Cash Flow, Minimum

+ References

No definition available.

+ Details

Name:	cnr_DebtInstrumentCovenantComplianceExcessCashFlowMinimum
Namespace Prefix:	cnr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Debt Instrument, Covenant Compliance, Percentage of Specified Availability

+ References

No definition available.

+ Details

Name:	cnr_DebtInstrumentCovenantCompliancePercentageofSpecifiedAvailability
Namespace Prefix:	cnr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Covenant Compliance, Secured Leverage Ratio, Maximum

+ References

No definition available.

+ Details

Name:	cnr_DebtInstrumentCovenantComplianceSecuredLeverageRatioMaximum
Namespace Prefix:	cnr_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Covenant Terms, Fixed Charge Coverage Ratio

+ References

No definition available.

+ Details

Name:	cnr_DebtInstrumentCovenantTermsFixedChargeCoverageRatio
Namespace Prefix:	cnr_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Covenant Terms, Specific Availability In Excess Of Threshold of Calendar Days

+ References

No definition available.

+ Details

Name:	cnr_DebtInstrumentCovenantTermsSpecificAvailabilityInExcessOfThresholdofCalendarDays
Namespace Prefix:	cnr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Discount Rate

+ References

No definition available.

+ Details

Name:	cnr_DebtInstrumentDiscountRate
Namespace Prefix:	cnr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Installment Payment as a Percentage of Principal

+ References

No definition available.

+ Details

Name:	cnr_DebtInstrumentInstallmentPaymentasaPercentageofPrincipal
Namespace Prefix:	cnr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Mandatory Prepayment Terms, Percentage of Annual Excess Cash Flow

+ References

No definition available.

+ Details

Name:	cnr_DebtInstrumentMandatoryPrepaymentTermsPercentageofAnnualExcessCashFlow
Namespace Prefix:	cnr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Secured Debt, Percentage Of Non-U.S. Capital Stock Held By Company

+ References

No definition available.

+ Details

Name:	cnr_DebtInstrumentSecuredDebtPercentageOfNonU.S.CapitalStockHeldByCompany
Namespace Prefix:	cnr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line Of Credit Facility, Increase in Borrowing Capacity, Amount

+ References

No definition available.

+ Details

Name:	cnr_LineOfCreditFacilityIncreaseinBorrowingCapacityAmount
Namespace Prefix:	cnr_
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:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ 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 http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ 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 http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: 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 http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6036836-161870

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 http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

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 http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

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

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of principal amount of debt redeemed.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
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:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ 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(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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_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

+ 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:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(13))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 2: 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))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ 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 (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

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

- Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=cnr_CashFlowRevolverMember
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

Name:	us-gaap_DebtInstrumentAxis=cnr_EightPercentSeniorNotesDue2026Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cnr_A6125SeniorNotesDueJanuary2029Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=cnr_DebtInstrumentRedemptionPeriodSixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=cnr_DebtInstrumentRedemptionPeriodSevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=cnr_DebtInstrumentRedemptionPeriodEightMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=cnr_DebtInstrumentRedemptionPeriodNineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=cnr_AblFacilityMember
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:

- Details

Name:	us-gaap_DebtInstrumentAxis=cnr_ABLU.S.FacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
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:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	cnr_DebtCovenantTermsAxis=cnr_CommitmentFeePercentageOneMember
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:	cnr_DebtPrepaymentTermsAxis=cnr_LeverageRatioTargetAchievedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=cnr_PlyGemMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=cnr_PlyGemMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

LONG-TERM DEBT - Additional Information (Details) - USD ($)					9 Months Ended
	Sep. 24, 2020	Nov. 16, 2018	Oct. 15, 2018	Apr. 12, 2018	Oct. 03, 2020	Dec. 31, 2019	Nov. 15, 2018	Oct. 14, 2018
Line of Credit Facility [Line Items]
Debt instrument, interest rate, stated percentage					6.125%
Term Loan Facility due April 2025
Line of Credit Facility [Line Items]
Installment payment as a percentage of principal				1.00%
Debt instrument, interest rate during period					3.90%
Debt instrument, effective rate					6.51%
Mandatory prepayment, percentage of annual excess cash flow				50.00%
Debt instrument, covenant compliance, excess cash flow, minimum				$ 10,000,000.0
Cash Flow Revolver
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity				$ 115,000,000.0
Weighted average interest rate on debt					3.31%
Secured debt, percentage of capital stock held by foreign subsidiary				65.00%
Debt instrument, covenant compliance, secured leverage ratio, maximum				7.75
ABL Facility
Line of Credit Facility [Line Items]
Weighted average interest rate on debt					1.87%
Remaining borrowing capacity on line of credit					$ 570,000,000
Revolving loans outstanding					0
Line of credit outstanding					$ 36,500,000
8.00% senior notes due April 2026
Line of Credit Facility [Line Items]
Debt instrument, effective rate					8.64%
Debt instrument, interest rate, stated percentage		8.00%		8.00%	8.00%	8.00%
8.00% senior notes due April 2026 \| Prior to April 15, 2021, 100% redemption
Line of Credit Facility [Line Items]
Debt instrument, redemption price, percentage		100.00%
8.00% senior notes due April 2026 \| Prior to April 15 ,2021, 40% redemption
Line of Credit Facility [Line Items]
Debt instrument, redemption price, percentage		108.00%
Debt instrument, redemption price, percentage of principal amount redeemed		40.00%
8.00% senior notes due April 2026 \| On or after April 15, 2021
Line of Credit Facility [Line Items]
Debt instrument, redemption price, percentage		104.00%
8.00% senior notes due April 2026 \| On or after April 15, 2023
Line of Credit Facility [Line Items]
Debt instrument, redemption price, percentage		100.00%
6.125% senior notes due January 2029
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 500,000,000.0
Debt instrument, discount rate	6.125%
Debt instrument, interest rate, stated percentage	6.125%				6.125%	6.125%
6.125% senior notes due January 2029 \| Prior to September 15, 2023
Line of Credit Facility [Line Items]
Debt instrument, redemption price, percentage	100.00%
6.125% senior notes due January 2029 \| Prior to September 15, 2023
Line of Credit Facility [Line Items]
Debt instrument, redemption price, percentage	106.125%
Debt instrument, redemption price, percentage of principal amount redeemed	40.00%
6.125% senior notes due January 2029 \| On or after September 15, 2023 and prior to September 15, 2024
Line of Credit Facility [Line Items]
Debt instrument, redemption price, percentage	103.063%
6.125% senior notes due January 2029 \| On or after September 15, 2024 and prior to September 15, 2025
Line of Credit Facility [Line Items]
Debt instrument, redemption price, percentage	101.531%
6.125% senior notes due January 2029 \| On or after September 15, 2025
Line of Credit Facility [Line Items]
Debt instrument, redemption price, percentage	100.00%
ABL Facility \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity		$ 611,000,000.0	$ 396,000,000.0	$ 360,000,000.0
Increase in borrowing capacity		215,000,000.0	36,000,000.0
Payment on outstanding borrowings		325,000,000.0
Fixed charge coverage ratio				1.00
Debt instrument, covenant compliance, percentage of specified availability				10.00%
Debt instrument, covenant terms, specific availability In excess of threshold of calendar days				20 days
ABL Facility \| Revolving Credit Facility \| ABL U.S. Facility
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity		483,700,000	313,500,000	$ 285,000,000.0			$ 313,500,000	$ 285,000,000.0
ABL Facility \| Revolving Credit Facility \| ABL Canadian Facility
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity		127,300,000	$ 82,500,000	$ 75,000,000.0			$ 82,500,000	$ 75,000,000.0
London Interbank Offered Rate (LIBOR) \| Term Loan Facility due April 2025
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate, floor				0.00%
Debt instrument, basis spread on variable rate				3.75%
London Interbank Offered Rate (LIBOR) \| Cash Flow Revolver
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate, floor				0.00%
London Interbank Offered Rate (LIBOR) \| ABL Facility
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate, floor				0.00%
Base Rate \| Term Loan Facility due April 2025
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				2.75%
Minimum \| Cash Flow Revolver \| Commitment Fee Percentage One
Line of Credit Facility [Line Items]
Unused commitment fee				0.25%
Minimum \| ABL Facility \| Commitment Fee Percentage One
Line of Credit Facility [Line Items]
Unused commitment fee				0.25%
Minimum \| London Interbank Offered Rate (LIBOR) \| Cash Flow Revolver
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				2.50%
Minimum \| London Interbank Offered Rate (LIBOR) \| ABL Facility
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				1.25%
Minimum \| Base Rate \| Cash Flow Revolver
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				1.50%
Minimum \| Base Rate \| ABL Facility
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				0.25%
Maximum \| Cash Flow Revolver \| Commitment Fee Percentage One
Line of Credit Facility [Line Items]
Unused commitment fee				0.50%
Maximum \| London Interbank Offered Rate (LIBOR) \| Cash Flow Revolver
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				3.00%
Maximum \| London Interbank Offered Rate (LIBOR) \| ABL Facility
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				1.75%
Maximum \| Base Rate \| Cash Flow Revolver
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				2.00%
Maximum \| Base Rate \| ABL Facility
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				0.75%
Leverage Ratio Target Achieved \| Minimum \| Term Loan Facility due April 2025
Line of Credit Facility [Line Items]
Mandatory prepayment, percentage of annual excess cash flow				25.00%
Leverage Ratio Target Achieved \| Maximum \| Term Loan Facility due April 2025
Line of Credit Facility [Line Items]
Mandatory prepayment, percentage of annual excess cash flow				0.00%
Ply Gem \| 8.00% senior notes due April 2026
Line of Credit Facility [Line Items]
Debt instrument, face amount				$ 645,000,000.0
Ply Gem \| Term Loan Facility due April 2025
Line of Credit Facility [Line Items]
Debt instrument, face amount				$ 1,755,000,000.0
Debt instrument, discount rate				0.50%
Increase in borrowing capacity		$ 805,000,000.0
Ply Gem \| 8.00% senior notes due April 2026
Line of Credit Facility [Line Items]
Debt instrument, discount rate				2.25%