General - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($) lease	Sep. 30, 2018 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Reclassification of income tax effects for ASU 2018-02		$ 47.6
Number of operating leases | lease	120
Operating lease right-of-use assets	$ 134.3
Operating lease liability	144.0
Long-term operating lease liabilities	126.0
Short term lease liability	$ 18.0
Operating lease weighted average remaining term	10 years
Operating lease discount rate	4.09%
Operating lease expense	$ 5.8