Share-Based Payments - Liabilities (Details) - EUR (€) € in Millions	Dec. 31, 2020	Dec. 31, 2019
Share-Based Payments
Share-based payment liabilities, current	€ 863	€ 1,130
Other non-financial liabilities, current	€ 4,643	€ 4,839
Share-based payment liabilities as % of B/S other non-financial liabilities, current	19.00%	23.00%
Share-based payment liabilities, non-current	€ 454	€ 605
Other non-financial liabilities, non-current	€ 770	€ 957
Share-based payment liabilities as % of B/S other non-financial liabilities, non-current	59.00%	63.00%
Share-based payment liabilities	€ 1,317	€ 1,735
Other non-financial liabilities	€ 5,413	€ 5,796
Share-based payment liabilities as % of B/S other non-financial liabilities	24.00%	30.00%
Other financial assets, current	€ 1,635	€ 297
Other financial assets, non-current	3,512	2,336
Other financial assets	€ 5,147	€ 2,633

No definition available.

Name:	ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of liabilities arising from share-based payment transactions. Share-based payment transactions are transactions in which the entity: (a) receives goods or services from the supplier of those goods or services (including an employee) in a share-based payment arrangement; or (b) incurs an obligation to settle the transaction with the supplier in a share-based payment arrangement when another group entity receives those goods or services. [Refer: Share-based payment arrangements [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2020-01-01
-Paragraph 51
-Subparagraph b
-Clause i
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_51_b_i&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_LiabilitiesFromSharebasedPaymentTransactions2011
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of current financial assets that the entity does not separately disclose in the same statement or note. [Refer: Other financial assets; Current financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 54
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_d&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_OtherCurrentFinancialAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of current non-financial liabilities that the entity does not separately disclose in the same statement or note. [Refer: Other financial liabilities]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_OtherCurrentNonfinancialLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of financial assets that the entity does not separately disclose in the same statement or note. [Refer: Financial assets]

+ References

+ Details

Name:	ifrs-full_OtherFinancialAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of non-current financial assets that the entity does not separately disclose in the same statement or note. [Refer: Other financial assets]

+ References

+ Details

Name:	ifrs-full_OtherNoncurrentFinancialAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of non-current non-financial liabilities that the entity does not separately disclose in the same statement or note. [Refer: Other financial liabilities]

+ References

+ Details

Name:	ifrs-full_OtherNoncurrentNonfinancialLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of non-financial liabilities that the entity does not separately disclose in the same statement or note. [Refer: Other financial liabilities]

+ References

+ Details

Name:	ifrs-full_OtherNonfinancialLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of current liabilities arising from share-based payment transactions. Share-based payment transactions are transactions in which the entity: (a) receives goods or services from the supplier of those goods or services (including an employee) in a share-based payment arrangement; or (b) incurs an obligation to settle the transaction with the supplier in a share-based payment arrangement when another group entity receives those goods or services.

+ References

No definition available.

+ Details

Name:	sap_CurrentLiabilitiesFromShareBasedPaymentTransactions
Namespace Prefix:	sap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The percent of current liabilities arising from share-based payment transactions to other non-financial liabilities.

+ References

No definition available.

+ Details

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

- Definition

The percent of liabilities arising from share-based payment transactions to other non-financial liabilities.

+ References

No definition available.

+ Details

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

- Definition

The amount of non-current liabilities arising from share-based payment transactions. Share-based payment transactions are transactions in which the entity: (a) receives goods or services from the supplier of those goods or services (including an employee) in a share-based payment arrangement; or (b) incurs an obligation to settle the transaction with the supplier in a share-based payment arrangement when another group entity receives those goods or services.

+ References

No definition available.

+ Details

Name:	sap_NonCurrentLiabilitiesFromShareBasedPaymentTransactions
Namespace Prefix:	sap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The percent of non-current liabilities arising from share-based payment transactions to other non-financial liabilities.

+ References

No definition available.

+ Details

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