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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2024

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]

Financial instruments measured at fair value on a recurring basis

The following table presents financial instruments measured at fair value on a recurring basis:

						March 31, 2024
(in millions)						Level 1						Level 2						Level 3						Total
Assets at Fair Value:
Marketable securities:
Corporate debt securities						$	10.0					$	—					$	—					$	10.0
Mutual funds						110.8						—						—						110.8
Equity securities						0.2						—						—						0.2
Total Marketable Securities						121.0						—						—						121.0
Total Assets at Fair Value						$	121.0					$	—					$	—					$	121.0

Fair value of Debt Instruments

At March 31, 2024, the fair values were as follows:

(in millions)			Fair Value						Level
$750.0 million fixed rate notes due March 2025			734.9						Level 2
$500.0 million fixed rate notes due June 2028			485.8						Level 2
$750.0 million fixed rate notes due March 2032			650.3						Level 2
$750.0 million fixed rate notes due September 2043			758.6						Level 2
$700.0 million fixed rate notes due June 2048			615.3						Level 2

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The entire disclosure of the fair value measurement of assets and liabilities, which includes financial instruments measured at fair value that are classified in shareholders' equity, which may be measured on a recurring or nonrecurring basis.

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