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Stockholders’ Equity and Earnings Per Share (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Mar. 03, 2020
Stockholders' Equity and Earnings Per Share [Line Items]
Amount of stock repurchase authorized by the Board of Directors				$ 500.0
Repurchased (in shares)	4,471,682
Average price (in dollars per share)	$ 32.64
Total repurchase cost	$ 146.0
RSUs
Stockholders' Equity and Earnings Per Share [Line Items]
Weighted average shares of anti-dilutive restricted stock units (in shares)	134,000	15,000	10,000