Revenue Recognition (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues [Abstract]
Deferred Revenue, Revenue Recognized	$ 752.2
Customer Concentration Risk [Member] \| Concentration Risk Benchmark [Domain] \| Other Customer
Concentration Risk [Line Items]
Concentration Risk, Percentage	33.00%	34.00%	33.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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