Other Operating (Income) and Expenses, Net - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Component Of Other Operating Income And Expense [Line Items]
Other operating expenses and (income), net	$ 9.1	$ 18.2	$ (0.8)
Asset and portfolio rationalization charge		18.8
Gain (Loss) Related to Litigation Settlement		7.7
Gain (Loss) on Sale of Properties		25.3
Gain on sale of assets, excess land	3.1	39.3	19.4
Nonrecurring repair costs			12.7
Reversal of accruals for sales tax and unclaimed property contingencies	6.9
Noncash portion of asset and portfolio rationalization charge	17.0	$ 17.0
Cash portion of asset and portfolio rationalization charge	$ 1.8
Other Operating (Income) and Expenses, Net
Component Of Other Operating Income And Expense [Line Items]
Gain on sale of assets, excess land			19.4
Other Operating (Income) and Expenses, Net | Executive
Component Of Other Operating Income And Expense [Line Items]
Retirement expense			$ 10.8