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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME        
Net income and comprehensive income $ 549.6 $ 434.2 $ 1,365.6 $ 1,222.1
-Derivative instruments classified as cash flow hedge:        
- Unrealized (loss) on derivative instruments classified as cash flow hedge (net of income tax of $0.2 million in 2022)       (0.6)
Total other comprehensive income (loss)       (0.6)
Total comprehensive income 549.6 434.2 1,365.6 1,221.5
Comprehensive income attributable to the non-controlling interest 2.1 1.9 4.9 5.0
Comprehensive income attributable to SCC $ 547.5 $ 432.3 $ 1,360.7 $ 1,216.5