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Pension Plans
 6 Months Ended
Feb. 28, 2021
Retirement Benefits [Abstract]  
Pension Plans Pension Plans
We have several pension plans, both qualified and non-qualified, covering certain hourly and salaried employees. Benefits paid under these plans are based generally on employees’ years of service and/or compensation during the final years of employment. We make at least the minimum annual contributions to the plans to the extent indicated by actuarial valuations and statutory requirements. Plan assets are invested primarily in equity and fixed income securities.
Service cost of net periodic pension cost is allocated between Cost of products sold and Selling, distribution, and administrative expenses in the Consolidated Statements of Comprehensive Income based on the nature of the employee's services. All other components of net periodic pension cost are included within Miscellaneous expense, net in the Consolidated Statements of Comprehensive Income. Net periodic pension cost included the following components before tax for the periods presented (in millions):
 Three Months EndedSix Months Ended
 February 28, 2021February 29, 2020February 28, 2021February 29, 2020
Service cost$1.3 $1.1 $2.5 $2.3 
Interest cost1.5 1.9 3.1 3.7 
Expected return on plan assets(3.3)(3.1)(6.6)(6.2)
Amortization of prior service cost0.7 1.0 1.4 2.0 
Recognized actuarial loss1.3 1.4 2.7 2.8 
Net periodic pension cost$1.5 $2.3 $3.1 $4.6 
Further details regarding our pension plans are included within the Pension and Defined Contribution Plans footnote of the Notes to Consolidated Financial Statements within our Form 10-K.