Stockholders' Equity - Dividends Declared (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Class of Stock [Line Items]
Dividends declared	$ 115.3	$ 115.3	$ 218.4	$ 218.4
Series D
Class of Stock [Line Items]
Dividends declared	$ 11.1	$ 11.1	$ 22.3	$ 22.3
Dividends declared, per share amount (in USD per share)	$ 14.88	$ 14.88	$ 29.76	$ 29.76
Series F
Class of Stock [Line Items]
Dividends declared	$ 12.2	$ 12.2	$ 12.2	$ 12.2
Dividends declared, per share amount (in USD per share)	$ 2,500	$ 2,500	$ 2,500	$ 2,500
Series G
Class of Stock [Line Items]
Dividends declared	$ 33.0	$ 33.0	$ 66.0	$ 66.0
Dividends declared, per share amount (in USD per share)	$ 1,343.75	$ 1,343.75	$ 2,687.5	$ 2,687.5
Series H
Class of Stock [Line Items]
Dividends declared	$ 22.2	$ 22.2	$ 44.5	$ 44.5
Dividends declared, per share amount (in USD per share)	$ 1,000	$ 1,000	$ 2,000	$ 2,000
Series I
Class of Stock [Line Items]
Dividends declared	$ 20.6	$ 20.6	$ 41.2	$ 41.2
Dividends declared, per share amount (in USD per share)	$ 1,000	$ 1,000	$ 2,000	$ 2,000
Series J
Class of Stock [Line Items]
Dividends declared	$ 6.7	$ 6.7	$ 13.4	$ 13.4
Dividends declared, per share amount (in USD per share)	$ 11.13	$ 11.13	$ 22.26	$ 22.26
Series K
Class of Stock [Line Items]
Dividends declared	$ 9.5	$ 9.5	$ 18.8	$ 18.8
Dividends declared, per share amount (in USD per share)	$ 1,250	$ 1,250	$ 2,500	$ 2,500