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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
COMPREHENSIVE INCOME:
Net income and comprehensive income	$ 1,491.9	$ 1,548.2	$ 732.4
Other comprehensive income (loss) net of tax:
-Decrease (increase) in pension and other post-retirement benefits (net of income tax of $3.7, $2.1 and $(1.6), respectively)	(7.7)	(2.9)	2.6
-Foreign currency translation adjustments			0.3
Total other comprehensive income (loss)	(7.7)	(2.9)	2.9
Total comprehensive income	1,484.2	1,545.3	735.3
Comprehensive income attributable to the non-controlling interest	6.1	5.2	3.9
Comprehensive income attributable to SCC	$ 1,478.1	$ 1,540.1	$ 731.4

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