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Debt (Tables)

12 Months Ended

Dec. 31, 2022

Debt Disclosure [Abstract]

Summary of Debt

At December 31, 2022 and 2021, our long-term debt and interest rates on that debt were as follows (dollars in millions):

		December 31, 2022				December 31, 2021
		Amount				Amount
Revolving Credit Facility		$	—			$	—
3.65% Senior Notes, net of discount of $0.2 million    and $0.4 million as of December 31, 2022 and 2021,    respectively, due September 2024			399.8				399.6
3.40% Senior Notes, net of discount of $0.9 million    and $1.0 million as of December 31, 2022 and 2021,    respectively, due December 2027			499.1				499.0
3.00% Senior Notes, net of discount of $0.5 million    as of both December 31, 2022 and 2021, due December 2029			499.5				499.5
4.05% Senior Notes, net of discount of $3.3 million    and $3.4 million as of December 31, 2022 and 2021,    respectively, due December 2049			396.7				396.6
3.05% Senior Notes, net of discount of $3.6 million    and $3.7 million as of December 31, 2022 and 2021,    respectively, due October 2051			696.4				696.3
Total			2,491.5				2,491.0
Less unamortized debt issuance costs			17.9				19.5
Total long-term debt		$	2,473.6			$	2,471.5

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Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

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