Business Description And Significant Accounting Policies: Earnings Per Share Reconciliation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Net income available for common stock	$ 291.6	$ 273.1	$ 262.2
Weighted average shares - Basic (in shares)	73.0	69.8	67.0
Dilutive effect of equity compensation	0.2	0.1	0.1
Weighted average shares - diluted (in shares)	73.2	69.9	67.1	73.2
Net income available for common stock, per share - Diluted	$ 3.98	$ 3.91	$ 3.91

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details