CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 445.9	$ 439.1
Accounts receivable, net	340.6	319.3
Inventories	274.8	235.7
Other current assets	49.3	64.6
Total current assets	1,110.6	1,058.7
Property, plant and equipment	1,858.1	1,820.1
Less: accumulated depreciation and amortization	1,018.3	980.8
Property, plant and equipment, net	839.8	839.3
Operating lease right-of-use assets	68.5	70.1
Investments in affiliated companies	199.6	192.7
Goodwill	107.6	107.8
Intangible assets, net	31.2	29.8
Deferred income taxes	13.7	14.0
Pension and other postretirement benefits	0.0	4.3
Other noncurrent assets	21.3	24.7
Total Assets	2,392.3	2,341.4
Current liabilities:
Notes payable and other current debt	2.3	2.3
Accounts payable	162.3	156.8
Pension and other postretirement benefits	2.2	2.2
Accrued salaries, wages and benefits	69.7	73.0
Income taxes payable	29.2	6.4
Operating lease liabilities	9.8	9.6
Other current liabilities	99.7	91.3
Total current liabilities	375.2	341.6
Long-term debt	253.9	255.0
Deferred income taxes	0.0	15.5
Pension and other postretirement benefits	52.6	52.5
Operating lease liabilities	60.9	62.4
Other long-term liabilities	43.4	41.2
Total Liabilities	786.0	768.2
Commitments and contingencies (Note 17)
Equity [Abstract]
Preferred stock, 3.0 million shares authorized; 0 shares issued and outstanding	0.0	0.0
Common stock, par value $0.25 per share; 200.0 million and 100.0 million shares authorized; shares issued: 75.3 million and 75.3 million; shares outstanding: 73.8 million and 74.1 million	18.8	18.8
Capital in excess of par value	263.1	272.7
Retained earnings	1,703.0	1,549.4
Accumulated other comprehensive loss	(187.8)	(149.6)
Treasury stock, at cost (1.5 million and 1.2 million shares)	(190.8)	(118.1)
Total Equity	1,606.3	1,573.2
Total Liabilities and Equity	$ 2,392.3	$ 2,341.4