Retirement Plans and Postretirement Benefit Plans - Defined Benefit Plan, Plan Assets, Category (Details) - USD ($) $ in Millions		Dec. 31, 2022	Dec. 31, 2021
U.S. common stocks [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		$ 71.9	$ 86.1
U.S. treasury notes and bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	[1]	44.6	135.2
Mortgage-backed securities
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		26.2	24.6
Corporate fixed income and other securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		65.5	107.0
Commingled fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	[2]	18.2	23.6
Foreign government bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.5	0.9
Municipal Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.9	1.4
Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		5.9	5.5
Interest and dividends receivable [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		1.6	2.1
Payable to broker for securities purchased [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		(25.2)	(2.0)
Mutual Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		60.4	99.8
Preferred Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		1.5	1.1
Cash Collateral [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.3	0.6
Receivable (foreign currency) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.1	0.1
Receivable from broker for securities sold [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		20.6
Total Plan investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		296.0	485.9
Plan Assets Attributable to Affiliates
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		(54.1)	(133.0)
Total Plan assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		293.0	486.0
Total Plan assets [Member] | Og and E [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		238.9	353.0
Fair Value, Inputs, Level 1 [Member] | U.S. common stocks [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		71.9	86.1
Fair Value, Inputs, Level 1 [Member] | U.S. treasury notes and bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	[1]	44.6	135.2
Fair Value, Inputs, Level 1 [Member] | Mortgage-backed securities
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.0	0.0
Fair Value, Inputs, Level 1 [Member] | Corporate fixed income and other securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.0	0.0
Fair Value, Inputs, Level 1 [Member] | Commingled fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	[2]	0.0	0.0
Fair Value, Inputs, Level 1 [Member] | Foreign government bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.0	0.0
Fair Value, Inputs, Level 1 [Member] | Municipal Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.0	0.0
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.0	0.0
Fair Value, Inputs, Level 1 [Member] | Mutual Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		60.4	99.8
Fair Value, Inputs, Level 1 [Member] | Preferred Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		1.5	1.1
Fair Value, Inputs, Level 1 [Member] | Cash Collateral [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.3	0.6
Fair Value, Inputs, Level 1 [Member] | Receivable (foreign currency) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.0	0.0
Fair Value, Inputs, Level 1 [Member] | Total Plan investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		178.7	322.8
Fair Value, Inputs, Level 2 [Member] | U.S. common stocks [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.0	0.0
Fair Value, Inputs, Level 2 [Member] | U.S. treasury notes and bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	[1]	0.0	0.0
Fair Value, Inputs, Level 2 [Member] | Mortgage-backed securities
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		26.2	24.6
Fair Value, Inputs, Level 2 [Member] | Corporate fixed income and other securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		65.5	107.0
Fair Value, Inputs, Level 2 [Member] | Commingled fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	[2]	0.0	0.0
Fair Value, Inputs, Level 2 [Member] | Foreign government bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.5	0.9
Fair Value, Inputs, Level 2 [Member] | Municipal Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.9	1.4
Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.0	0.0
Fair Value, Inputs, Level 2 [Member] | Mutual Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.0	0.0
Fair Value, Inputs, Level 2 [Member] | Preferred Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.0	0.0
Fair Value, Inputs, Level 2 [Member] | Cash Collateral [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.0	0.0
Fair Value, Inputs, Level 2 [Member] | Receivable (foreign currency) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.1	0.1
Fair Value, Inputs, Level 2 [Member] | Total Plan investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		93.2	134.0
Net Asset Value [Member] | U.S. common stocks [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.0	0.0	[3]
Net Asset Value [Member] | U.S. treasury notes and bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	[1]	0.0	0.0	[3]
Net Asset Value [Member] | Mortgage-backed securities
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.0	0.0	[3]
Net Asset Value [Member] | Corporate fixed income and other securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.0	0.0	[3]
Net Asset Value [Member] | Commingled fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	[2]	18.2	23.6	[3]
Net Asset Value [Member] | Foreign government bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.0	0.0	[3]
Net Asset Value [Member] | Municipal Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.0	0.0	[3]
Net Asset Value [Member] | Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		5.9	5.5	[3]
Net Asset Value [Member] | Mutual Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.0	0.0	[3]
Net Asset Value [Member] | Preferred Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.0	0.0	[3]
Net Asset Value [Member] | Cash Collateral [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.0	0.0	[3]
Net Asset Value [Member] | Receivable (foreign currency) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0.0	0.0	[3]
Net Asset Value [Member] | Total Plan investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		$ 24.1	$ 29.1	[3]

[1] This category represents U.S. Treasury notes and bonds with a Moody's Investors Service rating of Aaa and Government Agency Bonds with a Moody's Investors Service rating of A1 or higher.

[2] This category represents units of participation in a commingled fund that primarily invested in stocks of international companies and emerging markets.

[3] GAAP allows the measurement of certain investments that do not have a readily determinable fair value at the net asset value. These investments do not consider the observability of inputs; therefore, they are not included within the fair value hierarchy.