General - Narrative (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) lease	Jul. 01, 2018 USD ($)	Jun. 30, 2019 USD ($) lease	Dec. 31, 2018 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Reclassification of income tax effects for ASU 2018-02		$ 47.6
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 129.6		$ 129.6
Operating lease liability	$ 139.8		$ 139.8
Number of operating leases | lease	120		120
Long term lease liability	$ 121.9		$ 121.9
Short term lease liability	$ 17.9		$ 17.9
Operating lease weighted average remaining term	10 years		10 years
Operating lease discount rate	4.08%		4.08%
Operating lease expense	$ 5.8		$ 11.6
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets				$ 128.4
Operating lease liability				$ 139.8