Shareholders' Equity (Narrative) (Details) - USD ($) $ in Millions	May 06, 2024	Mar. 31, 2024	Oct. 28, 2021
Subsequent Event [Member]
Class of Stock [Line Items]
Stock repurchase program, remaining authorization	$ 204.7
Class A Common Stock [Member]
Class of Stock [Line Items]
Securities issued		0
New Plan [Member] | Class A Common Stock [Member]
Class of Stock [Line Items]
Stock repurchase program, authorized			$ 1,000.0