Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Debt - Debt Outstanding (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Sep. 22, 2020
Debt Instrument [Line Items]
Long-term Debt, Current and Non-current, at Amortized Cost (Fair Value: 2022 - $1,195.1; 2021 - $1,152.1)	$ 1,386.9	$ 1,121.9
Senior Notes \| 5.000% Senior Notes Due September 19, 2022
Debt Instrument [Line Items]
Long-term Debt, Current and Non-current, at Amortized Cost (Fair Value: 2022 - $1,195.1; 2021 - $1,152.1)	$ 0.0	276.7
Senior Notes \| Senior Notes, 4.35 Percent Due February 15, 2025
Debt Instrument [Line Items]
Stated interest rate, percentage	4.35%
Long-term Debt, Current and Non-current, at Amortized Cost (Fair Value: 2022 - $1,195.1; 2021 - $1,152.1)	$ 449.3	449.0
Senior Notes \| Senior Notes, 2.400 Percent Due September 30, 2030
Debt Instrument [Line Items]
Stated interest rate, percentage			2.40%
Long-term Debt, Current and Non-current, at Amortized Cost (Fair Value: 2022 - $1,195.1; 2021 - $1,152.1)	$ 396.6	$ 396.2