Shareholders' Equity Share repurchase (Details) - $ / shares shares in Thousands					3 Months Ended	9 Months Ended
	Oct. 24, 2019	Jul. 25, 2019	Apr. 25, 2019	Jan. 24, 2019	Sep. 30, 2019	Sep. 30, 2019
Class of Stock [Line Items]
Common Stock, Dividends, Per Share, Declared		$ 0.28	$ 0.28	$ 0.28
Treasury Stock, Shares, Acquired					676	1,300
Treasury Stock Acquired, Average Cost Per Share					$ 34.77	$ 34.89
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased					1,600	1,600
Subsequent Event [Member]
Class of Stock [Line Items]
Common Stock, Dividends, Per Share, Declared	$ 0.28