Financing Arrangements - Long-term Debt Instruments (Parenthetical) (Detail)		9 Months Ended		12 Months Ended
	Oct. 01, 2015	Jun. 30, 2017	Jun. 30, 2016	Sep. 30, 2016
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Expiration Date		Nov. 01, 2021
Capital Lease Obligations [Member] | Minimum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate at Period End		2.72%	2.72%	2.72%
Capital Lease Obligations [Member] | Maximum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate at Period End		10.39%	10.39%	10.39%
Senior Notes [Member]
Debt Instrument [Line Items]
Senior Notes, Interest Rate at Period End	6.38%	6.38%	6.38%	6.38%
Line of Credit Facility, Expiration Date	Oct. 01, 2023	Oct. 01, 2023
Senior Secured Credit Facility | U.S. [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate at Period End		3.28%	2.77%	2.90%
Line of Credit Facility, Expiration Date		Oct. 01, 2020
Senior Secured Credit Facility | Canada [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate at Period End		3.20%	3.20%	3.20%
Line of Credit Facility, Expiration Date		Oct. 01, 2020
Term Loan [Member] | Senior Secured Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate at Period End		3.50%	4.00%	3.50%
Line of Credit Facility, Expiration Date		Oct. 01, 2022
Equipment Financing Facilities
Debt Instrument [Line Items]
Line of Credit Facility, Expiration Date		Sep. 01, 2021
Equipment Financing Facilities | Minimum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate at Period End		2.33%	2.33%	2.33%
Equipment Financing Facilities | Maximum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate at Period End		3.25%	4.49%	3.25%