General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Regulatory Assets and Liabilities [Table Text Block]

Our current and noncurrent regulatory asset and liability balances for the years ended December 31, 2018 and 2017 are as follows:

	December 31,
	2018		2017
	(Millions)
Current assets reported within Other current assets and deferred charges	$	103	$	102
Noncurrent assets reported within Regulatory assets, deferred charges, and other	495		376
Total regulated assets	$	598	$	478
Current liabilities reported within Accrued liabilities	$	5	$	18
Noncurrent liabilities reported within Regulatory liabilities, deferred income, and other	1,321		1,250
Total regulated liabilities	$	1,326	$	1,268