Income Tax Expense (Tables)

3 Months Ended

Mar. 31, 2022

Income Tax Disclosure [Abstract]

Income Tax Expense [Table Text Block]

	Three Months Ended
	March 31,
	2022	2021
Millions
Current Income Tax Expense (a)
Federal	—	—
State	$0.1	—
Total Current Income Tax Expense	$0.1	—
Deferred Income Tax Expense (Benefit)
Federal (b)	$(8.6)	$(14.1)
State	4.8	3.9
Investment Tax Credit Amortization	(0.2)	(0.2)
Total Deferred Income Tax Benefit	$(4.0)	$(10.4)
Total Income Tax Benefit	$(3.9)	$(10.4)

(a)For the three months ended March 31, 2022 and 2021, the federal and state current tax expense was minimal due to NOLs which resulted from the bonus depreciation provisions of certain tax legislation. Federal and state NOLs are being carried forward to offset current and future taxable income.

(b)For the three months ended March 31, 2022 and 2021, the federal income tax benefit is primarily due to production tax credits.

Reconciliation of Taxes from Federal Statutory Rate to Total Income Tax Expense [Table Text Block]

	Three Months Ended
Reconciliation of Taxes from Federal Statutory	March 31,
Rate to Total Income Tax Expense	2022		2021
Millions
Income Before Income Taxes	$42.6		$33.0
Statutory Federal Income Tax Rate	21	%	21	%
Income Taxes Computed at Statutory Federal Rate	$8.9		$6.9
Increase (Decrease) in Income Tax Due to:
State Income Taxes (Credit) – Net of Federal Income Tax Benefit	3.9		3.1
Production Tax Credits	(17.6)		(18.6)
Regulatory Differences – Excess Deferred Tax	(3.8)		(3.2)
Non-Controlling Interest in Subsidiaries	3.8		1.8
Share-Based Compensation	0.5		0.5
Other	0.4		(0.9)
Total Income Tax Benefit	$(3.9)		$(10.4)