Income Taxes - Income Tax-Related Litigation (Details) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Income Taxes
Additional tax expense if tax authorities were to prevail in ongoing dispute	€ 2,013	€ 1,746
Interest expenses and penalties included in additional tax expense	€ 982	€ 842

The amount of income tax contingencies. Including, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies.

No definition available.

Name:	sap_IncomeTaxContingency
Namespace Prefix:	sap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration