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Leases Maturities of Lease Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2019	Jan. 01, 2019
Leases [Abstract]
2019 (excluding the three months ended March 31, 2019)	$ 18.2
2020	15.0
2021	9.3
2022	8.5
2023	8.8
Thereafter	15.3
Total lease payments	75.1
Less imputed interest	(16.1)
Total	$ 59.0	$ 64.6

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Amount of lessee's undiscounted obligation for lease payments for operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
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Present value of lessee's discounted obligation for lease payments from operating lease.

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