Consolidated Statements of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 464,000,000.0	$ 356,300,000	$ 408,700,000
Other comprehensive income (loss):
Foreign currency translation adjustments	(7,300,000)	800,000	3,700,000
Reclassification of foreign currency translation adjustments into earnings	0	0	(2,100,000)
Net change in pension and post-retirement benefit liabilities	11,800,000	(8,700,000)	(7,100,000)
Net change in fair value of cash flow hedges	29,800,000	7,000,000.0	1,300,000
Reclassification of pension and post-retirement benefit losses into earnings	(7,900,000)	(5,900,000)	(5,700,000)
Pension settlements	1,200,000	600,000	99,200,000
Share of equity method investments other comprehensive income	0	(1,200,000)	0
Reclassification of cash flow hedge losses into earnings	(26,900,000)	3,700,000	6,900,000
Other comprehensive income before taxes	16,500,000	8,100,000	111,800,000
Tax expense	(7,400,000)	(1,500,000)	(26,800,000)
Other comprehensive income, net of tax	9,100,000	6,600,000	85,000,000.0
Comprehensive income	$ 473,100,000	$ 362,900,000	$ 493,700,000