CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Dividends on Common Stock per share (USD per share)	$ 1.2	$ 1.2	$ 1.2
Common stock, par value (USD per share)	1	1
Common Stock
Common stock, par value (USD per share)	1	1	1
Class B Common Stock
Common stock, par value (USD per share)	$ 1	$ 1	$ 1