Revenue Recognition (Volume Commitment Programs) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Dec. 31, 2019
Volume commitment programs
Disaggregation of Revenue [Line Items]
Commitment contract assets	$ 87.9	$ 83.9
Commitment contract assets reclassified to accounts receivable	4.9
Up front customer loyalty programs and volume commitment programs
Disaggregation of Revenue [Line Items]
Estimation of future revenues	$ 1,900.0

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

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