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SUPPLEMENTAL CASH FLOW INFORMATION
6 Months Ended
Jun. 30, 2021
Supplemental Cash Flow Information [Abstract]  
SUPPLEMENTAL CASH FLOW INFORMATION SUPPLEMENTAL CASH FLOW INFORMATION
Six Months Ended June 30
(in millions)20212020
Cash paid for interest, net of amount capitalized$31.7 $32.0 
Cash received for income taxes, net(35.1)— 
Significant non-cash investing and financing transactions:
Accounts payable related to construction costs16.3 33.1