Quarterly report pursuant to Section 13 or 15(d)

VARIABLE INTEREST ENTITIES (Details)

v3.20.2
VARIABLE INTEREST ENTITIES (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Variable Interest Entity [Line Items]          
Net Income (Loss) Attributable to Noncontrolling Interest $ 15.8 $ 0.0 $ 19.3 $ 0.0  
Cash and cash equivalents 73.7   73.7   $ 352.6
Inventories 1,933.6   1,933.6   317.4
Property, plant and equipment, net 4,547.9   4,547.9   1,929.0
Accounts payable (504.8)   (504.8)   (193.2)
Noncontrolling interest (325.3)   (325.3)   $ 0.0
SunCoke Middletown [Member] | Variable Interest Entity, Primary Beneficiary [Member]          
Variable Interest Entity [Line Items]          
Net Income (Loss) Attributable to Noncontrolling Interest 16.0   19.5    
Cash and cash equivalents 1.0   1.0    
Inventories 21.2   21.2    
Property, plant and equipment, net 309.2   309.2    
Accounts payable (5.6)   (5.6)    
Other Assets (Liabilities), Net (1.2)   (1.2)    
Noncontrolling interest $ (324.6)   $ (324.6)