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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Net income | $ 100.2 | $ 110.7 | $ 147.3 | $ 165.7
Pension Plan and Restoration of Retirement Income Plan: |  |  |  |
Amortization of deferred net loss, net of tax of $0.3, $0.3, $0.5 and $0.5, respectively | 1.0 | 1.0 | 1.7 | 1.7
Settlement cost, net of tax of $0.1, $0.0, $2.3 and $0.0, respectively | 0.5 | 0.0 | 7.1 | 0.0
Postretirement Benefit Plans: |  |  |  |
Amortization of prior service credit, net of tax of ($0.1), ($0.2), ($0.2) and ($0.3), respectively | (0.4) | (0.3) | (0.9) | (0.8)
Amortization of deferred net gain, net of tax of $0.0, $0.0, $0.0 and $0.0, respectively | 0.1 | 0.0 | 0.1 | 0.0
Other comprehensive income, net of tax | 1.0 | 0.7 | 7.8 | 0.9
Comprehensive income | $ 101.2 | $ 111.4 | $ 155.1 | $ 166.6

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