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Debt (Details) - USD ($)	Jun. 30, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Fair value	$ 1,422,700,000	$ 1,400,700,000
Debt and Lease Obligation	1,589,300,000	1,588,700,000
Senior Notes Due 2026 [Member]
Debt Instrument [Line Items]
Debt	$ 550,000,000
Debt Instrument, Interest Rate, Stated Percentage	3.875%
Debt Instrument, Face Amount	$ 550,000,000
Debt and Lease Obligation	549,300,000	549,000,000.0
Senior Notes Due 2026 [Member] | Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Fair value	546,300,000	541,400,000
Senior Notes Due 2051
Debt Instrument [Line Items]
Debt	$ 650,000,000
Debt Instrument, Interest Rate, Stated Percentage	3.85%
Debt Instrument, Face Amount	$ 650,000,000
Debt and Lease Obligation	643,500,000	643,400,000
Senior Notes Due 2051 | Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Fair value	463,900,000	458,000,000.0
Senior Notes Due 2034
Debt Instrument [Line Items]
Debt	$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage	5.75%
Debt Instrument, Face Amount	$ 400,000,000
Debt and Lease Obligation	396,400,000	396,200,000
Senior Notes Due 2034 | Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Fair value	$ 412,400,000	$ 401,300,000

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