Long Term Debt and Financing Arrangements - Schedule of Long Term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Long-term debt	$ 1,436.3	$ 1,506.0
Term loan
Debt Instrument [Line Items]
Current portion of long-term debt	0.0	34.4
Long-term debt	0.0	71.6
Senior Notes
Debt Instrument [Line Items]
Current portion of long-term debt		34.4
Long-term debt	$ 1,436.3	1,540.4
Senior Notes \| Senior notes at 3.625%
Debt Instrument [Line Items]
Interest rate, stated percentage	3.625%
Long-term debt	$ 299.1	298.8
Senior Notes \| Senior notes at 3.35%
Debt Instrument [Line Items]
Interest rate, stated percentage	3.35%
Long-term debt	$ 396.3	395.7
Senior Notes \| Senior notes at 3.15%
Debt Instrument [Line Items]
Interest rate, stated percentage	3.15%
Long-term debt	$ 296.3	295.9
Senior Notes \| Senior notes at 3.50%
Debt Instrument [Line Items]
Interest rate, stated percentage	3.50%
Long-term debt	$ 444.6	444.0
2018 Credit Facility
Debt Instrument [Line Items]
Long-term debt	$ 0.0	$ 0.0

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
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19,20)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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