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Additional Financial Information (Accounts Receivable Monetization) (Details) - Trade Accounts Receivable - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Dec. 31, 2019	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021
Individual Monetization Agreements
Transfer of Financial Assets Accounted for as Sales [Line Items]
Net cash proceeds received		$ 338.5	$ 311.7
Carrying value of receivables transferred and derecognized		340.4	313.2
Loss (gain) recorded related to transfers of receivables		1.9	1.5
Derecognized accounts receivable for which the Company continues to service, amount outstanding		509.2		$ 562.8
Pooled Monetization Agreements
Transfer of Financial Assets Accounted for as Sales [Line Items]
Gross cash proceeds received for receivables transferred and derecognized		39.1	52.3
Less amounts from collections reinvested under revolving agreement		(29.3)	(41.3)
Proceeds from new transfers		9.8	11.0
Collections not reinvested and remitted or to be remitted		(12.4)	(10.4)
Net cash proceeds received		(2.6)	0.6
Carrying value of receivables transferred and derecognized		39.0	52.0
Obligations recorded		(0.1)	0.4
Loss (gain) recorded related to transfers of receivables		(0.2)	$ 0.1
Derecognized accounts receivable for which the Company continues to service, amount outstanding		96.4		$ 99.0
Revolving agreement, maximum amount of receivables allowed to transfer	$ 150.0
Accounts receivable pledged as collateral under pooled monetization agreement		$ 73.1

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