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Commitments and Contingencies (Narrative) (Detail) $ in Millions			3 Months Ended	12 Months Ended
	Aug. 12, 2022 USD ($)	Jun. 21, 2021 USD ($)	Sep. 30, 2014 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2023 USD ($) a	Dec. 31, 2022 USD ($)
Environmental Claims For A Site In Goodyear Arizona
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies, revision in estimates			$ 49.0	$ 18.9
Estimated liability					$ 21.7	$ 24.8
Accrued environmental loss contingencies current					$ 7.8	7.7
Loss contingency reimbursement rate					21.00%
Other receivables					$ 3.8	$ 4.8
Environmental Claims For Crab Orchard National Wildlife Refuge Superfund Site
Loss Contingencies [Line Items]
Approximate size of referenced site | a					55,000
Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Cash contributed in sale	$ 550.0
Goodyear Site
Loss Contingencies [Line Items]
Proceeds from sale of property		$ 8.7

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Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable in twelve months or in the next operating cycle if longer.

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