Revenue Recognition (Up-Front Customer Loyalty Programs) (Details) - Up Front Customer Loyalty Programs - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Capitalized customer acquisition costs	$ 162.6	$ 162.6	$ 158.0
Recognized as a reduction of revenue	$ 13.0	$ 26.4