Revenue (Narrative) (Details)	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
U.S. \| Sales returns, rebates, and discounts
Change in Accounting Estimate [Line Items]
Revenue, information used to determine revenue recognized, change in accounting estimate, percent	4.00%	1.00%	3.00%	2.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Balance Type:	na
Period Type:	duration