Condensed Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Sales	$ 2,461.4	$ 1,918.8
Operating expenses:
Cost of goods sold	1,807.5	1,423.8
Selling and administration	104.3	106.9
Restructuring charges	3.1	6.9
Operating income	546.5	381.2
Interest expense	32.9	84.5
Interest income	0.4	0.1
Non-operating pension income	(9.6)	(9.3)
Income before taxes	523.6	306.1
Income tax provision	130.6	62.5
Net income	$ 393.0	$ 243.6
Net income per common share:
Basic	$ 2.54	$ 1.54
Diluted	$ 2.48	$ 1.51
Average common shares outstanding:
Basic	154.7	158.6
Diluted	158.6	160.8