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STATUTORY INFORMATION (BASED ON NON-GAAP MEASURES) (Tables)
12 Months Ended
Dec. 31, 2016
Insurance [Abstract]  
Schedule of statutory accounting practices
The Company's insurance subsidiaries reported the following amounts to regulatory agencies, after appropriate elimination of intercompany accounts among such subsidiaries (dollars in millions):

 
2016
 
2015
Statutory capital and surplus
$
1,956.8

 
$
1,739.2

Asset valuation reserve
253.3

 
196.9

Interest maintenance reserve
486.9

 
476.0

Total
$
2,697.0

 
$
2,412.1