Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2023

Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]

Schedule of supplemental cash flow information

	Year Ended December 31
(in millions)	2023		2022		2021
Cash paid for interest, net of amount capitalized	$	653.4	$	485.2	$	473.8
Cash paid (received) for income taxes, net (1)	(58.9)		52.4		33.8
Significant non-cash investing and financing transactions:
Accounts payable related to construction costs	171.3		197.4		127.8
Increase in receivables related to insurance proceeds	3.5		—		41.7
Liabilities accrued for software licensing agreement	—		7.4		—

(1)    Cash received for income taxes in 2023 includes $75 million related to PTCs that were sold to a third party.

Reconciliation of cash, cash equivalents, and restricted cash

The following table reconciles the cash, cash equivalents, and restricted cash amounts reported within the balance sheets at December 31 to the total of these amounts shown on the statements of cash flows:

(in millions)	2023		2022		2021
Cash and cash equivalents	$	42.9	$	28.9	$	16.3
Restricted cash included in other current assets	70.1		25.6		19.6
Restricted cash included in other long-term assets	52.2		127.7		51.6
Cash, cash equivalents, and restricted cash	$	165.2	$	182.2	$	87.5