Income Taxes

6 Months Ended

Jun. 30, 2020

INCOME TAXES

The following table presents a reconciliation of the federal statutory corporate income tax rate to the effective income tax rate for the three and six months ended June 30, 2020 and 2019:


	Ameren			Ameren Missouri			Ameren Illinois
	2020	2019	2020	2019	2020	2019
Three Months
Federal statutory corporate income tax rate:	21%	21%	21%	21%	21%	21%
Increases (decreases) from:
Amortization of excess deferred taxes	(9)	(9)	(16)	(12)	(3)	(4)
Depreciation differences	—	—	—	—	1	(1)
Amortization of deferred investment tax credit	—	—	(1)	(1)	—	—
State tax	5	6	3	4	7	7




Effective income tax rate	17%	18%	7%	12%	26%	23%


	Ameren			Ameren Missouri			Ameren Illinois
	2020	2019	2020	2019	2020	2019
Six Months
Federal statutory corporate income tax rate:	21%	21%	21%	21%	21%	21%
Increases (decreases) from:
Amortization of excess deferred taxes	(9)	(8)	(16)	(12)	(3)	(4)
Depreciation differences	—	—	—	1	—	—
Amortization of deferred investment tax credit	—	—	(1)	(1)	—	—
State tax	5	6	3	4	7	7
Stock-based compensation	(2)	(3)	—	—	—	—


Other permanent items	—	(1)	—	(1)	—	—
Effective income tax rate	15%	15%	7%	12%	25%	24%

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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