Financing Arrangements - Long-term Debt Instruments (Parenthetical) (Detail)			9 Months Ended		12 Months Ended
	Jan. 02, 2018	Oct. 02, 2015	Jun. 30, 2018	Jun. 30, 2017	Sep. 30, 2017
Equipment Financing Facilities [Member]
Debt Instrument [Line Items]
Debt instrument maturity date			Sep. 30, 2021
Equipment Financing Facilities [Member] | Minimum [Member]
Debt Instrument [Line Items]
Equipment financing facilities, fixed interest rate percentage			2.33%	2.33%	2.33%
Equipment Financing Facilities [Member] | Maximum [Member]
Debt Instrument [Line Items]
Equipment financing facilities, fixed interest rate percentage			3.25%	3.25%	3.25%
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Debt instrument maturity date			Nov. 30, 2021
Capital Lease Obligations [Member] | Minimum [Member]
Debt Instrument [Line Items]
Capital lease obligations, fixed interest rate percentage			2.72%	2.72%	2.72%
Capital Lease Obligations [Member] | Maximum [Member]
Debt Instrument [Line Items]
Capital lease obligations, fixed interest rate percentage			10.39%	10.39%	10.39%
Senior Notes, Matures October 2023 [Member]
Debt Instrument [Line Items]
Debt interest rate at period end			6.38%	6.38%	6.38%
Debt instrument maturity date		Oct. 01, 2023	Oct. 31, 2023
Senior Notes, Matures November 2025 [Member]
Debt Instrument [Line Items]
Debt interest rate at period end			4.88%
Debt instrument maturity date			Nov. 01, 2025
Revolving Lines of Credit [Member] | 2020 ABL [Member]
Debt Instrument [Line Items]
Debt instrument maturity date		Oct. 01, 2020
Revolving Lines of Credit [Member] | 2020 ABL [Member] | U.S. [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate at Period End				3.28%
Line of Credit Facility, Expiration Date			Oct. 01, 2020
Debt extinguishment date			Jan. 02, 2018
Revolving Lines of Credit [Member] | 2020 ABL [Member] | Canada [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate at Period End				3.20%	3.70%
Line of Credit Facility, Expiration Date			Oct. 01, 2020
Debt extinguishment date			Jan. 02, 2018
Revolving Lines of Credit [Member] | 2023 ABL [Member]
Debt Instrument [Line Items]
Debt instrument maturity date	Jan. 02, 2023
Revolving Lines of Credit [Member] | 2023 ABL [Member] | U.S. [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate at Period End			3.78%
Line of Credit Facility, Expiration Date			Jan. 02, 2023
Revolving Lines of Credit [Member] | 2023 ABL [Member] | Canada [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate at Period End			3.95%
Line of Credit Facility, Expiration Date			Jan. 02, 2023
Term Loan [Member] | Term Loan, Matures October 1, 2022 [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate at Period End				3.50%	3.50%
Line of Credit Facility, Expiration Date			Oct. 01, 2022
Debt extinguishment date			Jan. 02, 2018
Term Loan [Member] | Term Loan, Matures January 2, 2025 [Member]
Debt Instrument [Line Items]
Debt interest rate at period end			4.35%
Debt instrument maturity date	Jan. 02, 2025		Jan. 02, 2025