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Equity (Share Repurchase Program) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Jan. 31, 2020	Nov. 30, 2019	Jun. 30, 2019	Feb. 28, 2019
Stockholders' Equity Note [Abstract]
Share repurchase program, authorized amount		$ 250,000,000	$ 200,000,000	$ 200,000,000	$ 200,000,000
Treasury stock acquired (in shares)	2,130,509
Treasury stock acquired, average price per share (in USD per share)	$ 55.06
Shares cancelled (in shares)	3,000,000

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Total cost of shares repurchased divided by the total number of shares repurchased.

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