Equity (Details) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share Repurchases [Abstract]
Number of Shares Authorized to be Repurchased	6,900		6,900
Treasury Stock, Shares, Acquired	0	1,100	0	1,200
Dividends, Common Stock, Cash	$ 1.6	$ 1.7	$ 3.3	$ 3.3