CONDENSED CONSOLIDATED STATEMENT OF EQUITY (UNAUDITED) (PARENTHETICAL) - $ / shares	3 Months Ended
Mar. 31, 2016	Dec. 31, 2015
Cash dividends on common stock (usd per share)	$ 0.30
Common Stock
Common stock, par value (usd per share)	1	$ 1
Class B Common Stock
Common stock, par value (usd per share)	$ 1	$ 1

Face amount or stated value per share of common stock.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 30
-Article 5

Name:	us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant