Borrowings and Other Financing Instruments Forward Equity Agreements (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	Dec. 31, 2024	Nov. 30, 2024
Forward Contract Indexed to Issuer's Equity [Line Items]
Shares Issued, Price Per Share		$ 64.44
Forward Equity Agreements [Member]
Forward Contract Indexed to Issuer's Equity [Line Items]
Common stock, shares to be issued through Forward Equity Agreement		21,100
Common stock, initial shares in an agreement		18,300
Common stock, additional shares in an agreement		2,800
Period End Settlement Price, in Cash	$ 1,370,000
Period End Net Share Settlement Price	1,400
Period End Net Cash Settlement Price	$ 94,000
Period End Settlement Price, in Shares	21,100
Expected Settlement Price	$ 1,360,000