Stockholders' Equity - Schedule of Repurchased Shares (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Equity [Abstract]
Number of shares repurchased (in shares)	0.3	0.2	1.6	0.9
Total cost of shares received	$ 190.5	$ 100.4	$ 802.7	$ 373.3

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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