Revenue - Contract (Details)	12 Months Ended
Dec. 31, 2018
Revenue
Minimum payment terms	30 days
Maximum payment terms	60 days

Maximum period of payment customer contract invoices, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	sap_CustomerContractPaymentTermMaximum
Namespace Prefix:	sap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration