The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time.

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The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]]

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

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The percentage of an expected dividend used to calculate the fair value of share options granted.

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The weighted average fair value at the measurement date of granted equity instruments other than share options. [Refer: Weighted average [member]]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The weighted average remaining contractual life of outstanding share options. [Refer: Weighted average [member]]

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The weighted average share price. [Refer: Weighted average [member]]

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The percentage of correlation between peer group index and the entity's share price used to calculate the fair value of share options granted.

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The percentage of peer group index dividend yield used to calculate the fair value of share options granted.

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The amount of peer group index price used to calculate the fair value of share options granted.

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The percentage of peer group index volatility used to calculate the fair value of share options granted.

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Share-Based Payments - Fair Value and Parameters for Cash-Settled Plans (Details)	12 Months Ended
	Dec. 31, 2017 EUR (€)	Dec. 31, 2016 EUR (€)	Dec. 31, 2017 USD ($) Y	Dec. 31, 2017 EUR (€) Y	Dec. 31, 2016 USD ($) Y	Dec. 31, 2016 EUR (€) Y
LTI 2016 Plan
SHARE-BASED PAYMENTS
Weighted average fair value				€ 84.16		€ 74.54
Weighted average share price	€ 93.45	€ 82.81
Risk-free interest rate (depending on maturity)		(0.76%)
Expected volatility		21.20%
Expected dividend yield	1.38%	1.45%
Weighted average remaining life of awards outstanding (in years) \| Y			2.9	2.9	3.0	3.0
Peer Group Index price \| $			$ 247.24		$ 179.57
Peer Group expected dividend yield			1.16%	1.16%	1.24%	1.24%
Peer Group expected volatility					18.00%	18.00%
Expected correlation of the SAP share price and index price					39.00%	39.00%
LTI 2015 Plan
SHARE-BASED PAYMENTS
Weighted average fair value				€ 92.40		€ 81.10
Weighted average share price	€ 93.45	€ 82.81
Risk-free interest rate (depending on maturity)	(0.81%)
Expected dividend yield	1.38%	1.45%
Weighted average remaining life of awards outstanding (in years) \| Y			0.8	0.8	1.4	1.4
SOP
SHARE-BASED PAYMENTS
Weighted average fair value				€ 26.45		€ 20.94
Weighted average share price	€ 93.45	€ 82.81
Expected dividend yield	1.38%	1.46%
Weighted average remaining life of awards outstanding (in years) \| Y			1.6	1.6	2.4	2.4
RSU
SHARE-BASED PAYMENTS
Weighted average fair value				€ 92.08		€ 81.34
Weighted average share price	€ 93.45	€ 82.77
Expected dividend yield	1.38%	1.45%
Weighted average remaining life of awards outstanding (in years) \| Y			1.1	1.1	1.2	1.2
Lowest \| LTI 2016 Plan
SHARE-BASED PAYMENTS
Risk-free interest rate (depending on maturity)	(0.63%)
Expected volatility	17.50%
Peer Group expected volatility			16.00%	16.00%
Expected correlation of the SAP share price and index price			41.00%	41.00%
Lowest \| LTI 2015 Plan
SHARE-BASED PAYMENTS
Risk-free interest rate (depending on maturity)		(0.80%)
Lowest \| SOP
SHARE-BASED PAYMENTS
Risk-free interest rate (depending on maturity)	(0.62%)	(0.51%)
Expected volatility	21.10%	22.30%
Lowest \| RSU
SHARE-BASED PAYMENTS
Risk-free interest rate (depending on maturity)	(0.70%)	(0.36%)
Highest \| LTI 2016 Plan
SHARE-BASED PAYMENTS
Risk-free interest rate (depending on maturity)	(0.48%)
Expected volatility	19.60%
Peer Group expected volatility			17.00%	17.00%
Expected correlation of the SAP share price and index price			48.00%	48.00%
Highest \| LTI 2015 Plan
SHARE-BASED PAYMENTS
Risk-free interest rate (depending on maturity)		(0.84%)
Highest \| SOP
SHARE-BASED PAYMENTS
Risk-free interest rate (depending on maturity)	(0.41%)	(0.83%)
Expected volatility	34.50%	51.00%
Highest \| RSU
SHARE-BASED PAYMENTS
Risk-free interest rate (depending on maturity)	(0.32%)	(0.84%)