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Pension Benefits and Postretirement Benefits Other Than Pensions (Details) - Pension Plans - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Noncash settlement charge		$ 70.2
Noncash settlement charge, after tax		$ 55.5
Net assets of pension plan	$ 18.2		$ 16.4
Settlement adjustment	$ 2.7

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- Definition

Amount of asset, recognized in statement of financial position, for overfunded defined benefit pension and other postretirement plans.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of asset retirement obligations settled through noncash transactions. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset.

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