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Note 2 - Significant Accounting Policies and Methods of Application (Details) - Purchase Price Allocation (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Jan. 31, 2013
NiSource Inc. [Member]
Business Acquisition [Line Items]        
Current assets       $ 3
PP&E       12
Goodwill 1,888 1,837 1,813 51
Intangible assets       62
Current liabilities       (6)
Total purchase price       $ 122