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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Tax Contingency [Line Items]
Effective income tax rate reconciliation, percent	15.40%	3.60%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%
Income tax expense (benefit)	$ (25.5)	$ 10.2
Continuing Operations | BAM
Income Tax Contingency [Line Items]
Income tax expense (benefit)		$ 1.1

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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