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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 156.2	$ 46.2
Other comprehensive income (loss), net of tax:
Gain (loss) on cash flow hedges, net of tax (expense) benefit of ($0.6) and $1.8, respectively	1.8	(5.1)
Comprehensive income	$ 158.0	$ 41.1

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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