Basis of Presentation and Summary of Significant Accounting Policies (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($) Segment	Dec. 31, 2018 USD ($)
Basis of Presentation and Summary of Significant Accounting Policies [Abstract]
Number of reportable segments | Segment	4
Recently Adopted Accounting Standards [Abstract]
Operating liabilities	$ 57.9
Right-of-use assets	47.1
ASU 2016-02 [Member]
Recently Adopted Accounting Standards [Abstract]
Operating liabilities		$ 61.4
Right-of-use assets		50.5
Deferred charges		10.9
ASU 2018-02 [Member]
Recently Adopted Accounting Standards [Abstract]
Reclassification of certain tax effects from accumulated other comprehensive income		0.0
ASU 2018-02 [Member] | Retained Earnings [Member]
Recently Adopted Accounting Standards [Abstract]
Reclassification of certain tax effects from accumulated other comprehensive income	10.9	10.9
ASU 2018-02 [Member] | Accumulated Other Comprehensive Loss [Member]
Recently Adopted Accounting Standards [Abstract]
Reclassification of certain tax effects from accumulated other comprehensive income	$ (10.9)	$ (10.9)