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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Net income | $ 110.7 | $ 104.8 | $ 165.7 | $ 140.8
Pension Plan and Restoration of Retirement Income Plan: |  |  |  |
Amortization of deferred net loss, net of tax of $0.3, $0.4, $0.5 and $0.8, respectively | 1.0 | 0.8 | 1.7 | 1.4
Postretirement Benefit Plans: |  |  |  |
Amortization of prior service credit, net of tax of ($0.2), ($0.0), ($0.3) and ($0.0), respectively | (0.3) | 0.0 | (0.8) | 0.0
Other comprehensive income, net of tax | 0.7 | 0.8 | 0.9 | 1.4
Comprehensive income | $ 111.4 | $ 105.6 | $ 166.6 | $ 142.2

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