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Retirement Plans and Postretirement Benefit Plans - Defined Benefit Plan, Plan Assets, Category (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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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.

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