Capital (Details) $ / shares in Units, $ in Millions |
12 Months Ended | ||||
|---|---|---|---|---|---|
|
Mar. 15, 2019
USD ($)
$ / shares
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Mar. 16, 2018
USD ($)
$ / shares
|
Dec. 31, 2019
shares
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Dec. 31, 2018
shares
|
Dec. 31, 2017
shares
|
|
| Class of Stock [Line Items] | |||||
| Payments of dividends | $ | $ 46.5 | $ 31.7 | |||
| Sub Shares | |||||
| Class of Stock [Line Items] | |||||
| Ratio of certificates to sub-shares | 0.000333333333333333 | ||||
| Number of shares repurchased and retired (in shares) | shares | 6,258 | 59,185 | 105,715 | ||
| Cash Dividend | Sub Shares | |||||
| Class of Stock [Line Items] | |||||
| Dividend paid per sub-share (in USD per share) | $ 1.75 | $ 1.05 | |||
| Special Dividend | Sub Shares | |||||
| Class of Stock [Line Items] | |||||
| Dividend paid per sub-share (in USD per share) | $ 4.25 | $ 3.00 | |||
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- Definition Number Of Shares Used In Ratio1 No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of shares that have been repurchased and retired during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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