Retirement and Postretirement Plans (Defined Benefit Plans) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 1,800,000	$ 1,900,000	$ 5,500,000	$ 6,800,000
Expected return on plan assets	(2,900,000)	(3,400,000)	(8,800,000)	(10,800,000)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0	0	100,000
Amortization of net loss	1,600,000	1,900,000	4,700,000	5,000,000.0
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement		(100,000)	3,300,000	8,400,000
Net pension expense	1,800,000	1,700,000	8,600,000	13,300,000
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Assets Transferred to (from) Plan				40,600,000
Defined contribution savings plans expense	7,300,000	7,300,000	23,100,000	23,600,000
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits			200,000
Cost of Goods and Service Benchmark [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	500,000	500,000	1,500,000	1,300,000
Selling, General and Administrative Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 800,000	$ 900,000	$ 2,400,000	$ 2,500,000