Stockholders' Equity - Schedule of Repurchased Shares (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Equity [Abstract]
Number of shares repurchased (in shares)	0.6	0.0	1.3	0.7
Total cost of shares received	$ 288.6	$ 0.0	$ 612.1	$ 272.8

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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Balance Type:	debit
Period Type:	duration