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COMMON EQUITY - COMMON STOCK DIVIDENDS (Details) - $ / shares		3 Months Ended		6 Months Ended
	Jul. 20, 2017	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Dividends Payable
Quarterly cash dividend declared (in dollars per share)		$ 0.5200	$ 0.4950	$ 1.0400	$ 0.9900
Subsequent event
Dividends Payable
Quarterly cash dividend declared (in dollars per share)	$ 0.52

X

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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=27012166&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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