Revenue Recognition and Accounts Receivable (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Revenue Recognition And Accounts Receivable [Line Items]
Trade receivables, net	$ 2,440.8	$ 2,640.1
Other receivables	312.4	418.7
Accounts receivable, net	2,753.2	3,058.8
Securitized accounts receivable	409.5	407.0
Receivables Facility
Revenue Recognition And Accounts Receivable [Line Items]
Accounts receivable securitization facility maximum borrowing capacity	400.0
Note Securitization Facility [Member]
Revenue Recognition And Accounts Receivable [Line Items]
Accounts receivable securitization facility maximum borrowing capacity	200.0
Variable Consideration
Revenue Recognition And Accounts Receivable [Line Items]
Trade receivables, net	1,349.8	1,512.0
Other receivables	694.4	796.5
Accounts receivable, net	$ 2,044.2	$ 2,308.5