Stockholders' Equity - Dividends Declared (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Class of Stock [Line Items]
Dividends declared	$ 70.0	$ 103.0	$ 288.4	$ 321.4
Series D
Class of Stock [Line Items]
Dividends declared	$ 11.2	$ 11.2	$ 33.5	$ 33.5
Dividends declared, per share amount (in USD per share)	$ 14.88	$ 14.88	$ 44.64	$ 44.64
Series F
Class of Stock [Line Items]
Dividends declared	$ 0.0	$ 0.0	$ 12.2	$ 12.2
Dividends declared, per share amount (in USD per share)	$ 0	$ 0	$ 2,500	$ 2,500
Series G
Class of Stock [Line Items]
Dividends declared	$ 0.0	$ 33.0	$ 66.0	$ 99.0
Dividends declared, per share amount (in USD per share)	$ 0	$ 1,343.75	$ 2,687.5	$ 4,031.25
Series H
Class of Stock [Line Items]
Dividends declared	$ 22.2	$ 22.2	$ 66.7	$ 66.7
Dividends declared, per share amount (in USD per share)	$ 1,000	$ 1,000	$ 3,000	$ 3,000
Series I
Class of Stock [Line Items]
Dividends declared	$ 20.6	$ 20.6	$ 61.8	$ 61.8
Dividends declared, per share amount (in USD per share)	$ 1,000	$ 1,000	$ 3,000	$ 3,000
Series J
Class of Stock [Line Items]
Dividends declared	$ 6.7	$ 6.7	$ 20.1	$ 20.1
Dividends declared, per share amount (in USD per share)	$ 11.13	$ 11.13	$ 33.39	$ 33.39
Series K
Class of Stock [Line Items]
Dividends declared	$ 9.3	$ 9.3	$ 28.1	$ 28.1
Dividends declared, per share amount (in USD per share)	$ 1,250	$ 1,250	$ 3,750	$ 3,750