XML 40 R27.htm IDEA: XBRL DOCUMENT v3.3.1.900
Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2015
Fair Value Disclosures [Abstract]  
Fair Value, by Balance Sheet Grouping [Table Text Block]
OG&E's long-term debt is recorded at the carrying amount. The following table summarizes the fair value and carrying amount of OG&E's long-term debt at December 31, 2015 and December 31, 2014.

Year Ended December 31 (In millions)
2015
2014
 
Carrying
Amount 
Fair
Value
Carrying
Amount 
Fair
Value
Long-Term Debt
 
 
 
 
Senior Notes
$
2,510.2

$
2,754.6

$
2,509.7

$
2,957.7

Industrial Authority Bonds
135.4

135.4

135.4

135.4

Tinker Debt
10.0

9.2

10.2

10.3