v2.4.0.8
Asset Retirement Obligations (Tables)
 6 Months Ended
Jun. 30, 2013
Asset Retirement Obligation [Abstract]  
Changes In Company's Liability For Asset Retirement Obligations
Changes in NiSource’s liability for asset retirement obligations for the six months ended June 30, 2013 and 2012 are presented in the table below:
 
(in millions)
2013
 
2012
Balance as of January 1,
$
160.4

 
$
146.4

Accretion expense
0.6

 
0.5

Accretion recorded as a regulatory asset/liability
4.4

 
4.3

Additions
3.0

 
—

Settlements
(0.6
)
 
(1.5
)
Change in estimated cash flows
(0.7
)
 
—

Balance as of June 30,
$
167.1

 
$
149.7