XML 98 R83.htm IDEA: XBRL DOCUMENT v3.10.0.1
Income Taxes (Schedule Of Principal Components Of Net Deferred Tax Liability) (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Deferred Tax Liabilities    
Accelerated depreciation and other property differences $ 2,458.0 $ 2,260.7
Other regulatory assets 375.4 309.5
Total Deferred Tax Liabilities 2,833.4 2,570.2
Deferred Tax Assets    
Deferred investment tax credits and other regulatory liabilities 365.5 406.0
Pension and other postretirement/postemployment benefits 157.5 136.7
Net operating loss carryforward 849.8 576.0
Environmental liabilities 24.4 24.0
Other accrued liabilities 37.5 37.2
Other, net 68.2 97.4
Total Deferred Tax Assets 1,502.9 1,277.3
Net Deferred Tax Liabilities $ 1,330.5 $ 1,292.9