Pension and Postretirement Plans - Narrative (Details)	1 Months Ended	2 Months Ended	3 Months Ended	8 Months Ended	9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 07, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 07, 2021 USD ($)	Sep. 30, 2022 USD ($) Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Adjustments to goodwill					$ 35,000,000.0
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				$ 900,000	$ 0
Expected future employer contributions, next fiscal year	$ 0		$ 0		0
Pension Plans, Defined Benefit [Member] | Nonqualified Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Contributions to pension plans	200,000			1,800,000	1,600,000
Expected future employer contributions, next fiscal year			3,000,000		3,000,000
Pension Plans, Defined Benefit [Member] | Hawaii Plans [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Decrease in benefit obligations		$ 7,400,000	6,800,000	7,400,000	6,800,000
Settlements		$ 800,000	1,400,000	7,400,000	6,800,000
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Expected future employer contributions, next fiscal year			8,000,000.0		8,000,000.0
Contributions to postretirement plans	$ 500,000			$ 4,300,000	$ 5,300,000
Other Postretirement Benefits Plan [Member] | Hawaii Plans [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Adjustments to postretirement and other benefits liability			45,900,000
Adjustments to goodwill			35,000,000.0
Adjustments to deferred income tax liabilities			$ 10,900,000