Related Party Transactions - Consumers (Tables) (Consumers Energy Company [Member])

12 Months Ended

Dec. 31, 2013

Consumers Energy Company [Member]

Schedule of Related Party Transactions, by Related Party Table

In Millions
Description	Related Party	2013			2012			2011
Purchases of capacity and energy	Affiliates of CMS Enterprises		$	89		$	86		$	81