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Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) (Notes)
 9 Months Ended
Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Income (Loss)
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

The sole component of accumulated other comprehensive income (loss) (“AOCI”) relates to activity in the accounting for pension and postretirement health and life benefit plans. Amortization of actuarial (gains) losses, net, and amortization of prior service costs (credits), net, are items reclassified from AOCI and included in the computation of net periodic benefit cost (credit) as detailed in Note 10, Pension and Postretirement Health and Life Benefits.