Shareholders' Equity Share repurchase (Details) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) $ / shares shares
Equity [Abstract]
Treasury Stock, Shares, Acquired	731
Treasury Stock Acquired, Average Cost Per Share | $ / shares	$ 27.36
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	3,500
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	3,500
Stock Repurchase Program, Authorized Amount | $	$ 100.0