Basis of Presentation Pension and Post-Retirement Benefits (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right of use assets	$ 364.3	$ 420.6
Lease liability	$ 368.0	$ 437.3

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