CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Net sales	$ 2,066.0	$ 2,208.8	$ 4,011.7	$ 4,097.8
Cost of sales	1,825.9	1,824.2	3,570.3	3,398.1
Gross income	240.1	384.6	441.4	699.7
Operating expenses:
Selling, general and administrative	167.9	177.6	337.1	349.6
Amortization of purchased intangibles	2.8	3.2	5.6	5.5
Total operating expenses	170.7	180.8	342.7	355.1
Operating income	69.4	203.8	98.7	344.6
Other income (expense):
Interest expense	(13.2)	(12.2)	(25.8)	(24.0)
Interest income	1.3	0.5	2.3	1.1
Miscellaneous, net	(15.1)	0.4	(14.0)	3.5
Income before income taxes and losses of unconsolidated affiliates	42.4	192.5	61.2	325.2
Provision for (benefit of) income taxes	13.7	(21.9)	33.9	11.3
Income before losses of unconsolidated affiliates	28.7	214.4	27.3	313.9
Equity in losses of unconsolidated affiliates	(1.8)	(0.5)	(2.5)	(0.4)
Net income	$ 26.9	$ 213.9	$ 24.8	$ 313.5
Earnings per share:
Basic	$ 0.41	$ 3.11	$ 0.38	$ 4.57
Diluted	0.41	3.07	0.37	4.51
Cash dividends declared per share on Common Stock	$ 0.37	$ 0.33	$ 0.74	$ 0.66