Financial Risk Factors and Risk Management - Derivatives Designated as Hedging Instruments (Fair Value Hedges) (Details)	Dec. 31, 2020	Dec. 31, 2019
Financial Risk Factors and Risk Management
Fixed-rate financial liabilities (as percent)	48.00%	35.00%

The percentage of fixed-rate outstanding financial liabilities.

No definition available.

Name:	sap_FixedRateInterestBearingFinancialLiabilities
Namespace Prefix:	sap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant