Debt Instrument, Debt Discount Write-Off

No definition available.

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- Definition

Amount of fee for an early repayment of debt.

+ References

No definition available.

+ Details

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- Definition

Percentage of par value on senior notes.

+ References

No definition available.

+ Details

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- Definition

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

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- Definition

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

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- 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.

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- Definition

Face (par) amount of the original debt instrument that was repurchased.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

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

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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- Definition

The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

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- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

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Debt - Senior Notes (Details) - USD ($)				3 Months Ended		12 Months Ended
Debt - Senior Notes (Details) - USD ($)	Aug. 11, 2020	Mar. 15, 2019	Jun. 01, 2017	Sep. 26, 2020	Mar. 30, 2019	Jan. 02, 2021	Dec. 28, 2019	Jan. 02, 2016	Aug. 31, 2020	Mar. 31, 2019
Debt
Long-term debt						$ 1,915,425,000	$ 1,872,273,000
Write off of deferred financing fees						3,338,000	2,850,000
5 1⁄8% Senior Notes, due 2025
Debt
Long-term debt						300,000,000	300,000,000
6 1⁄8% Senior Notes, due 2023:
Debt
Long-term debt						$ 0	649,133,000
Senior notes, interest rate (as a percent)						6.125%
Issuers \| 8 1/2% Senior Notes, due 2022
Debt
Senior notes, interest rate (as a percent)										8.50%
Senior notes, aggregate principal amount redeemed										$ 250,000,000.0
Loss on extinguishment of debt					$ (14,600,000)
Write off of deferred financing fees					2,900,000
Prepayment premium					11,700,000
Issuers \| 5 1⁄8% Senior Notes, due 2025
Debt
Long-term debt			$ 300,000,000.0
Senior notes, interest rate (as a percent)			5.125%
Percentage of par value of senior notes			100.00%
Proceeds net of related fees and expenses			$ 295,400,000
Issuers \| 6 1⁄8% Senior Notes, due 2023:
Debt
Senior notes, interest rate (as a percent)								6.125%	6.125%
Senior notes, aggregate principal amount redeemed									$ 650,000,000.0
Loss on extinguishment of debt				$ (4,100,000)
Write-off of debt discount				800,000
Write off of deferred financing fees				$ 3,300,000
Debt instrument, face amount								$ 650,000,000.0
Issuers \| 6 1/8% Senior Notes, due 2023, issued at par
Debt
Debt instrument, face amount								$ 350,000,000.0
Issuers \| 6 1/8% Senior Notes, due 2023, , issued at 99.375% of par
Debt
Percentage of par value of senior notes								99.375%
Debt instrument, face amount								$ 300,000,000.0
Issuers \| 5 1⁄4% Senior Notes, due 2029
Debt
Long-term debt	$ 700,000,000.0
Senior notes, interest rate (as a percent)	5.25%
Proceeds net of related fees and expenses	$ 690,400,000
Summit Materials, LLC
Debt
Long-term debt						$ 1,915,425,000	1,872,273,000
Write off of deferred financing fees						3,338,000	2,850,000
Summit Materials, LLC \| 8 1/2% Senior Notes, due 2022
Debt
Senior notes, interest rate (as a percent)										8.50%
Senior notes, aggregate principal amount redeemed										$ 250,000,000.0
Loss on extinguishment of debt					(14,600,000)
Write off of deferred financing fees					2,900,000
Prepayment premium					$ 11,700,000
Summit Materials, LLC \| 5 1⁄8% Senior Notes, due 2025
Debt
Long-term debt			$ 300,000,000.0			$ 300,000,000	300,000,000
Senior notes, interest rate (as a percent)			5.125%			5.125%
Percentage of par value of senior notes			100.00%
Proceeds net of related fees and expenses			$ 295,400,000
Summit Materials, LLC \| 6 1⁄8% Senior Notes, due 2023:
Debt
Long-term debt						$ 0	649,133,000
Senior notes, interest rate (as a percent)						6.125%
Senior Notes \| 6 1⁄2% Senior Notes, due 2027
Debt
Long-term debt						$ 300,000,000	300,000,000
Senior notes, interest rate (as a percent)						6.50%
Senior Notes \| 5 1⁄4% Senior Notes, due 2029
Debt
Long-term debt						$ 700,000,000	0
Senior notes, interest rate (as a percent)						5.25%
Senior Notes \| Issuers \| 6 1⁄2% Senior Notes, due 2027
Debt
Long-term debt		$ 300,000,000.0
Senior notes, interest rate (as a percent)		6.50%
Percentage of par value of senior notes		100.00%
Proceeds net of related fees and expenses		$ 296,300,000
Senior Notes \| Issuers \| 5 1⁄4% Senior Notes, due 2029
Debt
Percentage of par value of senior notes	100.00%
Senior Notes \| Summit Materials, LLC \| 6 1⁄2% Senior Notes, due 2027
Debt
Long-term debt						$ 300,000,000	300,000,000
Senior notes, interest rate (as a percent)						6.50%
Senior Notes \| Summit Materials, LLC \| 5 1⁄4% Senior Notes, due 2029
Debt
Long-term debt						$ 700,000,000	$ 0
Senior notes, interest rate (as a percent)						5.25%