Employee Benefit Plans	9 Months Ended
May 25, 2019
Postemployment Benefits [Abstract]
Employee Benefit Plans	7. Employee Benefit Plans Defined Contribution Retirement Savings Plan The Company has a defined contribution retirement savings plan with a 401(k) feature for all eligible U.S. and Canadian employees not under collective bargaining agreements. The Company matches a portion of the employee’s contribution and may make an additional contribution at its discretion. Contributions charged to expense under the plan for the thirteen weeks ended May 25, 2019 and May 26, 2018 were $5.8 million and $5.4 million, respectively. Contributions charged to expense under the plan for the thirty-nine weeks ended May 25, 2019 and May 26, 2018 were $14.6 million and $13.5 million, respectively. Pension Plans and Supplemental Executive Retirement Plans The Company maintains an unfunded Supplemental Executive Retirement Plan for certain eligible employees of the Company and two frozen non-contributory defined benefit pension plans. The amounts charged to expense related to these plans for the thirteen weeks ended May 25, 2019 and May 26, 2018 were $0.5 million and $0.6 million, respectively. The amounts charged to expense related to these plans for the thirty-nine weeks ended May 25, 2019 and May 26, 2018 were $1.6 million and $1.9 million, respectively.

Employee Benefit Plans

9 Months Ended

May 25, 2019

7. Employee Benefit Plans

Defined Contribution Retirement Savings Plan

The Company has a defined contribution retirement savings plan with a 401(k) feature for all eligible U.S. and Canadian employees not under collective bargaining agreements. The Company matches a portion of the employee’s contribution and may make an additional contribution at its discretion. Contributions charged to expense under the plan for the thirteen weeks ended May 25, 2019 and May 26, 2018 were $5.8 million and $5.4 million, respectively. Contributions charged to expense under the plan for the thirty-nine weeks ended May 25, 2019 and May 26, 2018 were $14.6 million and $13.5 million, respectively.

Pension Plans and Supplemental Executive Retirement Plans

The Company maintains an unfunded Supplemental Executive Retirement Plan for certain eligible employees of the Company and two frozen non-contributory defined benefit pension plans. The amounts charged to expense related to these plans for the thirteen weeks ended May 25, 2019 and May 26, 2018 were $0.5 million and $0.6 million, respectively. The amounts charged to expense related to these plans for the thirty-nine weeks ended May 25, 2019 and May 26, 2018 were $1.6 million and $1.9 million, respectively.