Shareholders' Equity (Schedule of Dividends Paid and Dividends Declared) (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	6 Months Ended
	Aug. 05, 2021	Jun. 30, 2021
February 19, 2021 [Member]
Date Declared		Feb. 19, 2021
Payable to Shareholders of Record at the Close of Business on		Mar. 10, 2021
Cash Paid Per Share		$ 0.58
Aggregate Amount Paid		$ 63.4
Date Paid/Date to be Paid		Mar. 26, 2021
April 26, 2021 [Member]
Date Declared		Apr. 26, 2021
Payable to Shareholders of Record at the Close of Business on		May 20, 2021
Cash Paid Per Share		$ 0.58
Aggregate Amount Paid		$ 63.4
Date Paid/Date to be Paid		Jun. 15, 2021
Subsequent Event [Member] | August 2, 2021 [Member]
Date Declared	Aug. 01, 2021
Payable to Shareholders of Record at the Close of Business on	Aug. 26, 2021
Cash to be Paid Per Share	$ 0.58
Date Paid/Date to be Paid	Sep. 23, 2021