Environmental Obligations - Environmental Reserve Rollforward and Recoveries and Reserves (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Accrual for Environmental Loss Contingencies [Roll Forward]
Environmental reserves, long-term	$ 356.5		$ 356.5		$ 415.9
Recorded Recoveries [Roll Forward]
Environmental charges, net	3.4	$ 3.7	1.0	$ 3.3
Environmental provision, net	7.2	8.0	8.4	14.9
Continuing Operations
Recorded Recoveries [Roll Forward]
Environmental charges, net	3.4	3.7	1.0	3.3
Discontinued Operations
Recorded Recoveries [Roll Forward]
Environmental charges, net	3.8	4.3	7.4	11.6
Other Assets Including Long-term Receivables, Net
Recorded Recoveries [Roll Forward]
Environmental recoveries, beginning			4.5
Increase (Decrease) in recoveries			2.0
Cash received			(0.5)
Environmental recoveries, ending	6.0		6.0
Other Liabilities
Recorded Recoveries [Roll Forward]
Environmental remediation provision, net	7.3	8.1	10.4	15.6
Other Assets
Recorded Recoveries [Roll Forward]
Environmental remediation provision, net	(0.1)	$ (0.1)	(2.0)	$ (0.7)
Gross
Accrual for Environmental Loss Contingencies [Roll Forward]
Total environmental reserves at December 31, 2021			514.6
Provision (Benefit)			11.4
(Spending) Recoveries			(46.6)
Foreign currency translation adjustments			(10.3)
Net change			(45.5)
Total environmental reserves at September 30, 2022	469.1		469.1
Environmental reserves, current	101.4		101.4
Environmental reserves, long-term	367.7		367.7
Total environmental reserves at September 30, 2022	469.1		469.1		514.6
Recoveries
Accrual for Environmental Loss Contingencies [Roll Forward]
Total environmental reserves at December 31, 2021			11.4
Provision (Benefit)			(1.0)
(Spending) Recoveries			0.0
Foreign currency translation adjustments			0.0
Net change			(1.0)
Total environmental reserves at September 30, 2022	12.4		12.4
Environmental reserves, current	1.2		1.2
Environmental reserves, long-term	11.2		11.2
Total environmental reserves at September 30, 2022	12.4		12.4		11.4
Net
Accrual for Environmental Loss Contingencies [Roll Forward]
Total environmental reserves at December 31, 2021			503.2
Provision (Benefit)			10.4
(Spending) Recoveries			(46.6)
Foreign currency translation adjustments			(10.3)
Net change			(46.5)
Total environmental reserves at September 30, 2022	456.7		456.7
Environmental reserves, current	100.2		100.2
Environmental reserves, long-term	356.5		356.5
Total environmental reserves at September 30, 2022	$ 456.7		$ 456.7		$ 503.2