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Consolidated Statements of Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Dividends Declared Per Share of Common Stock (in dollars per share)	$ 4.0250	$ 3.8800	$ 3.7275
Dividends Declared Per Share of Non Controlling Interests (in dollars per share)	4.0250	3.8800	3.7275
Limited Partner [Member]
Distribution Made to Limited Partner, Distributions Declared, Per Unit	$ 4.0250	$ 3.8800	$ 3.7275

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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)
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Per unit of ownership amount of cash distributions declared to unit-holder of a limited partnership (LP).

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-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
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