Related Parties (Tables)

12 Months Ended

Dec. 31, 2012

The sales credited to and purchases billed to IPL and WPL were as follows (in millions):

The amounts billed to IPL and WPL were as follows (in millions):



	IPL						WPL
	2012		2011		2010		2012		2011		2010
Corporate Services billings		$129		$153		$170		$102		$119		$127

As of December 31, net intercompany payables to Corporate Services were as follows (in millions):

The related amounts billed between the parties were as follows (in millions):

IPL [Member]

The sales credited to and purchases billed to IPL and WPL were as follows (in millions):

The amounts billed to IPL and WPL were as follows (in millions):



	IPL						WPL
	2012		2011		2010		2012		2011		2010
Corporate Services billings		$129		$153		$170		$102		$119		$127

As of December 31, net intercompany payables to Corporate Services were as follows (in millions):

WPL [Member]

The sales credited to and purchases billed to IPL and WPL were as follows (in millions):

The amounts billed to IPL and WPL were as follows (in millions):



	IPL						WPL
	2012		2011		2010		2012		2011		2010
Corporate Services billings		$129		$153		$170		$102		$119		$127

As of December 31, net intercompany payables to Corporate Services were as follows (in millions):

The related amounts billed between the parties were as follows (in millions):