Basis of Presentation Pension and Post-Retirement Benefits (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right of use assets	$ 402.8	$ 422.8
Lease liability	$ 399.3	$ 440.2

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration