Consolidated Statements of Income and Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Segment sales to external customers	$ 7,730,300,000	$ 6,658,200,000	$ 6,964,300,000
Cost of sales	(5,857,300,000)	(5,288,800,000)	(5,320,300,000)
Gross profit	1,873,000,000.0	1,369,400,000	1,644,000,000.0
Selling and administrative expenses	(576,800,000)	(539,600,000)	(557,600,000)
Goodwill impairment	0	(55,200,000)	0
Other expense, net	(54,800,000)	(50,700,000)	(32,700,000)
Income from operations	1,241,400,000	723,900,000	1,053,700,000
Non-operating pension income (expense)	19,700,000	2,300,000	(7,900,000)
Interest expense, net	(152,400,000)	(93,500,000)	(128,800,000)
Income before taxes	1,108,700,000	632,700,000	917,000,000.0
Provision for income taxes	(267,600,000)	(171,700,000)	(220,600,000)
Net income	$ 841,100,000	$ 461,000,000.0	$ 696,400,000
Net income per common share:
Basic	$ 8.87	$ 4.86	$ 7.36
Diluted	8.83	4.84	7.34
Dividends declared per common share	$ 4.00	$ 3.37	$ 3.16
Statements of Comprehensive Income:
Net income	$ 841,100,000	$ 461,000,000.0	$ 696,400,000
Foreign currency translation adjustment	400,000	0	0
Reclassification adjustments to cash flow hedges included in net income, net of tax of $0.0 million, $0.0 million, and $7.9 million for 2021, 2020, and 2019, respectively	0	0	10,200,000
Changes in unrealized (losses) gains on marketable debt securities, net of tax of $0.2 million, ($0.1) million, and $0.0 million for 2021, 2020, and 2019, respectively	(500,000)	300,000	0
Amortization of pension and postretirement plans actuarial loss and prior service cost, net of tax of ($3.3) million, ($3.6) million, and ($3.2) million for 2021, 2020, and 2019, respectively	10,000,000.0	10,700,000	9,600,000
Changes in unfunded employee benefit obligations, net of tax of ($19.9) million, ($1.3) million, and $13.6 million for 2021, 2020, and 2019, respectively	59,400,000	4,000,000.0	(40,500,000)
Net current-period other comprehensive income (loss)	69,300,000	15,000,000.0	(20,700,000)
Comprehensive income	$ 910,400,000	$ 476,000,000.0	$ 675,700,000