Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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Debt and Financing Arrangements - Schedule of Long Term Debt (Details) - USD ($) $ in Millions	Mar. 31, 2021	Mar. 12, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Long-term debt	$ 1,433.7		$ 1,436.9
Senior Notes
Debt Instrument [Line Items]
Long-term debt	$ 1,433.7		1,436.9
Senior Notes \| Senior notes at 3.625%
Debt Instrument [Line Items]
Interest rate, stated percentage	3.625%
Long-term debt	$ 0.0		299.2
Senior Notes \| Senior notes at 3.35%
Debt Instrument [Line Items]
Interest rate, stated percentage	3.35%
Long-term debt	$ 396.6		396.5
Senior Notes \| Senior notes at 3.15%
Debt Instrument [Line Items]
Interest rate, stated percentage	3.15%
Long-term debt	$ 296.6		296.4
Senior Notes \| Senior notes at 3.50%
Debt Instrument [Line Items]
Interest rate, stated percentage	3.50%
Long-term debt	$ 445.0		444.8
Senior Notes \| Senior notes at 2.300%
Debt Instrument [Line Items]
Interest rate, stated percentage	2.30%	2.30%
Long-term debt	$ 295.5		$ 0.0