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ASSET RETIREMENT OBLIGATIONS
 6 Months Ended
Jun. 30, 2017
Asset Retirement Obligation Disclosure [Abstract]  
ASSET RETIREMENT OBLIGATIONS
ASSET RETIREMENT OBLIGATIONS
 
Upon emergence from bankruptcy, as discussed in Note 3 – Fresh Start Accounting, the Company adopted fresh start accounting which included the adjustment of asset retirement obligations to estimated fair values at February 28, 2017. The change in our asset retirement obligations during the period from January 1, 2017 through February 28, 2017 (Predecessor) and the period from March 1, 2017 through June 30, 2017 (Successor) is set forth below (in millions, inclusive of current portion):
 
 
Asset retirement obligations as of January 1, 2017 (Predecessor)
$
242.0

Liabilities settled
(3.6
)
Divestment of properties
(8.7
)
Accretion expense
5.4

Asset retirement obligations as of February 28, 2017 (Predecessor)
235.2

Fair value fresh start adjustment
54.9

Asset retirement obligations as of February 28, 2017 (Successor)
290.1

Liabilities settled
(32.8
)
Accretion expense
11.6

Revision of estimates
11.0

Asset retirement obligations as of June 30, 2017 (Successor)
$
279.8