Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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Name:	us-gaap_TreasuryStockValueAcquiredCostMethod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Stockholders' Equity - Schedule of Repurchased Shares (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended			6 Months Ended
	May 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2020
Equity, Class of Treasury Stock [Line Items]
Number of shares repurchased (in shares)	9,806,805
Total cost of shares received	$ 5,000.0	$ 5,071.8	$ 336.0	$ 54.0
Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Number of shares repurchased (in shares)		0			719,167
Total cost of shares received					$ 272.8