Regulatory Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2019

Regulated Operations [Abstract]

Regulatory Assets and Liabilities

The Company has recorded regulatory assets and liabilities (in millions) that it expects to pass through to its customers in accordance with, and subject to, regulatory provisions as follows:

December 31,	2019		2018		Recovery/Refund Period
Regulatory assets
Current regulatory assets:
El Salvador energy pass through costs recovery	$	56	$	87	Quarterly
Other	57		69		1 year
Total current regulatory assets	113		156
Noncurrent regulatory assets:
IPL and DPL defined benefit pension obligations (1)	262		283		Various
IPL deferred Midwest ISO costs	75		88		9 years
IPL environmental costs	85		89		Various
Other	108		87		Various
Total noncurrent regulatory assets	530		547
Total regulatory assets	$	643	$	703
Regulatory liabilities
Current regulatory liabilities:
Overcollection of costs to be passed back to customers	$	80	$	83	1 year
Other	1		3		Various
Total current regulatory liabilities	81		86
Noncurrent regulatory liabilities:
IPL and DPL accrued costs of removal and AROs	863		847		Over life of assets
IPL and DPL income taxes payable to customers through rates	209		246		Various
Other	18		53		Various
Total noncurrent regulatory liabilities	1,090		1,146
Total regulatory liabilities	$	1,171	$	1,232

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Past expenditures on which the Company earns a rate of return.