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Equity (Stock Repurchase Program) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Feb. 23, 2021
Class of Stock [Line Items] |  |  |
Stock repurchased and retired during period (in shares) | 4.2 | 7.3 |
Common stock value acquired including acquisition costs | $ 48.4 | $ 74.6 |
Average cost per share (in dollars per share) | $ 11.48 | $ 10.16 |
Stock repurchase program remaining authorized amount | $ 33.8 |  |
Subsequent Event |  |  |
Class of Stock [Line Items] |  |  |
Stock repurchase program, authorized amount |  |  | $ 50.0

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