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COMMON EQUITY - COMMON STOCK DIVIDENDS (Details) - $ / shares	3 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Dividends payable
Common stock dividend declared (in dollars per share)		$ 0.6325	$ 0.6325	$ 0.6325	$ 0.59	$ 0.59	$ 0.59
Subsequent event
Dividends payable
Common stock dividend declared (in dollars per share)	$ 0.6325

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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

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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.

+ References

No definition available.

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