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Income Taxes - Tax Status of Dividends (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Schedule of Tax Status of Dividends [Line Items] |  |  |
Dividend per share | $ 2.41 | $ 2.38 | $ 2.34
Ordinary income | 92.00% | 100.00% | 97.00%
Capital gain | 8.00% | 0.00% | 3.00%
Additional tax status information: |  |  |
Allocation of Dividends, Qualified Dividend Income | 1.00% | 0.00% | 0.00%
Allocation of Dividends, Section 199A Dividend | 91.00% | 100.00% | 97.00%
Allocation of Dividend, Section 897 ordinary dividends | 2.00% | 0.00% | 0.00%
Allocation of Dividends, Section 897 capital gains | 4.00% | 0.00% | 0.00%
Parent Company [Member] |  |  |
Schedule of Tax Status of Dividends [Line Items] |  |  |
Dividend per share | $ 2.53 | $ 2.19 | $ 2.34

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
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