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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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