Acquisitions (Tables)

6 Months Ended

Mar. 31, 2026

Business Combination [Abstract]

Summary of Preliminary Purchase Price Allocation and Estimated Fair Values of Assets Acquired and Liabilities Assumed

The following table summarizes the preliminary purchase price allocation and the estimated fair values of the assets acquired and liabilities assumed as of March 31, 2026:


		March 31,
(Dollars in millions)		2026
Acquisition consideration:		$	2,500.8
Assets acquired:
Utility plant		$	1,829.4
Accounts receivable (net allowance of $1.7)			65.2
Inventories			7.1
Current regulatory assets			33.4
Other current assets			35.6
Non-current regulatory assets			42.1
Other non-current assets			0.4
Total assets acquired			2,013.2
Liabilities assumed:
Accounts payable			33.5
Other current liabilities			31.8
Non-current regulatory liabilities			173.5
Other non-current liabilities			11.5
Total liabilities assumed			250.3
Net assets acquired			1,762.9
Goodwill		$	737.9

Schedule of Unaudited Pro Forma Financial Information Adjustments

The following unaudited pro forma financial information reflects the consolidated results of operations of the Company assuming the acquisition had taken place on October 1, 2024. The most significant pro forma adjustments relate to:


		Three Months Ended March 31,								Six Months Ended March 31,
(In millions, except per share amounts)		2026				2025				2026				2025
Total Operating Revenues		$	1,167.8			$	1,110.5			$	1,980.7			$	1,821.1
Net Income			263.3				224.3				373.2				312.7