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Network
2307301 - Disclosure - Asset Retirement Obligations (Tables)
(http://www.atimetals.com/role/AssetRetirementObligationsTables)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001018963 (http://www.sec.gov/CIK)
Asset Retirement Obligation Disclosure [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
Asset Retirement Obligation Disclosure [Abstract]
 
Schedule of changes in asset retirement obligations
Changes in asset retirement obligations for the years ended December 31, 2016 and 2015 were as follows:
(In millions)
 
2016
 
2015
Balance at beginning of year
 
$
25.0

 
$
25.4

Accretion expense
 
0.7

 
0.6

Payments
 
(2.0
)
 
(0.8
)
Revision of estimates
 
(0.4
)
 
(0.2
)
Balance at end of year
 
$
23.3

 
$
25.0