Consolidated Balance Sheets - USD ($) shares in Millions, $ in Millions	Mar. 31, 2023	Dec. 31, 2022
ASSETS
Cash and cash equivalents	$ 81.9	$ 79.6
Receivables, net of allowance	333.2	323.5
Income tax receivable	10.1	7.8
Inventories:
Raw materials and supplies	410.1	423.6
Work in process	175.1	164.2
Finished goods	47.5	41.6
Inventory, Net	632.7	629.4
Restricted cash, including partially-owned subsidiaries of $74.1 and $74.4	181.1	214.7
Property, plant, and equipment, at cost, including partially-owned subsidiaries of $1,919.8 and $1,917.6	9,415.8	9,272.6
Less accumulated depreciation, including partially-owned subsidiaries of $610.9 and $599.0	2,439.3	2,385.8
Property, Plant and Equipment, Net	6,976.5	6,886.8
Goodwill	222.3	195.9
Other assets	401.4	386.6
Total assets	8,839.2	8,724.3
Liabilities and Equity [Abstract]
Accounts payable	314.5	287.5
Accrued liabilities	273.7	261.0
Debt:
Debt, Long-Term and Short-Term, Combined Amount	5,707.6	5,607.6
Deferred income taxes	1,133.2	1,134.7
Other liabilities	159.8	163.9
Total liabilities	$ 7,588.8	$ 7,454.7
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Preferred Stock, Shares Authorized	1.5	1.5
Preferred Stock, Shares Subscribed but Unissued	1.5	1.5
Preferred stock – 1.5 shares authorized and unissued	$ 0.0	$ 0.0
Common Stock, Shares Authorized	400.0	400.0
Common stock – 400.0 shares authorized	$ 0.8	$ 0.8
Capital in excess of par value	6.6	0.0
Retained earnings	975.6	992.6
Accumulated other comprehensive income	12.7	19.7
Treasury stock	(1.5)	(0.7)
Total Equity	994.2	1,012.4
Noncontrolling interest	256.2	257.2
Total stockholders' equity	1,250.4	1,269.6
Total liabilities and stockholders' equity	8,839.2	8,724.3
Recourse
Debt:
Debt, Long-Term and Short-Term, Combined Amount	704.3	624.1
Nonrecourse
Debt:
Debt, Long-Term and Short-Term, Combined Amount	5,003.3	4,983.5
Wholly-owned subsidiaries | Nonrecourse
Debt:
Debt, Long-Term and Short-Term, Combined Amount	3,826.9	3,800.7
Partially-owned subsidiaries
Inventories:
Property, plant, and equipment, at cost, including partially-owned subsidiaries of $1,919.8 and $1,917.6	1,919.8	1,917.6
Less accumulated depreciation, including partially-owned subsidiaries of $610.9 and $599.0	610.9	599.0
Partially-owned subsidiaries | Nonrecourse
Debt:
Debt, Long-Term and Short-Term, Combined Amount	$ 1,176.4	$ 1,182.8