Pension and Postretirement Plans - Narrative (Details)	3 Months Ended
	Mar. 31, 2022 USD ($) Plan	Mar. 31, 2021 USD ($)
Cincinnati Plans [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Number of noncontributory defined benefit pension plans | Plan	3
Pension Plans, Defined Benefit [Member] | Qualified Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Contributions to pension plans	$ 0	$ 700,000
Expected future employer contributions, next fiscal year	0
Pension Plans, Defined Benefit [Member] | Nonqualified Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Contributions to pension plans	600,000	700,000
Expected future employer contributions, next fiscal year	2,000,000
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Expected future employer contributions, next fiscal year	7,000,000
Contributions to postretirement plans	$ 1,500,000	$ 1,700,000