Property, Plant and Equipment (Tables)

6 Months Ended

Jun. 30, 2018

Property, Plant and Equipment [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

As of the closing date, the estimated fair value of the assets purchased and the liabilities assumed by WPL were as follows (in millions):

Property, plant and equipment, net		$81
Liabilities	7
Net assets acquired		$74