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Accumulated Other Comprehensive Loss (Tables) | 3 Months Ended
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Mar. 31, 2017
Other Comprehensive Income (Loss), Tax [Abstract] |
Components Of Accumulated Other Comprehensive Loss | The following tables display the components of Accumulated Other Comprehensive Loss:
Three Months Ended March 31, 2017 (in millions) | Gains and Losses on Securities(1) |  | Gains and Losses on Cash Flow Hedges(1) |  | Pension and OPEB Items(1) |  | Accumulated Other Comprehensive Loss(1)
Balance as of January 1, 2017 | $ | (0.6 | ) |  | $ | (6.9 | ) |  | $ | (17.6 | ) |  | $ | (25.1 | )
Other comprehensive income before reclassifications | 0.2 |  |  | 4.6 |  |  | 0.1 |  |  | 4.9 |
Amounts reclassified from accumulated other comprehensive loss | 0.2 |  |  | 0.3 |  |  | 0.1 |  |  | 0.6 |
Net current-period other comprehensive income | 0.4 |  |  | 4.9 |  |  | 0.2 |  |  | 5.5 |
Balance as of March 31, 2017 | $ | (0.2 | ) |  | $ | (2.0 | ) |  | $ | (17.4 | ) |  | $ | (19.6 | )
Three Months Ended March 31, 2016 (in millions) | Gains and Losses on Securities(1) |  | Gains and Losses on Cash Flow Hedges(1) |  | Pension and OPEB Items(1) |  | Accumulated Other Comprehensive Loss(1)
Balance as of January 1, 2016 | $ | (0.5 | ) |  | $ | (15.5 | ) |  | $ | (19.1 | ) |  | $ | (35.1 | )
Other comprehensive income (loss) before reclassifications | 1.7 |  |  | (71.2 | ) |  | 0.1 |  |  | (69.4 | )
Amounts reclassified from accumulated other comprehensive loss | — |  |  | 0.5 |  |  | 0.2 |  |  | 0.7 |
Net current-period other comprehensive income (loss) | 1.7 |  |  | (70.7 | ) |  | 0.3 |  |  | (68.7 | )
Balance as of March 31, 2016 | $ | 1.2 |  |  | $ | (86.2 | ) |  | $ | (18.8 | ) |  | $ | (103.8 | )
(1)All amounts are net of tax. Amounts in parentheses indicate debits.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 + Details
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