General (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease in retained earnings	$ (2,440.9)	$ (2,385.8)

The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant