The interest rate on borrowings. [Refer: Borrowings]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
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The cash outflow for repayments of subordinated liabilities. [Refer: Subordinated liabilities]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-IssueDate 2025-01-01
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The decrease in equity through payments on perpetual subordinated notes.

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The balance of deeply subordinated perpetual maturity notes recorded in equity. Due to the characteristics (mainly no mandatory repayment and no obligation to pay a coupon except in the event of a dividend distribution) of the note and in compliance with IAS 32 standard Financial instruments, the note is recorded in equity.

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Shareholders' equity and share-based payments - Perpetual subordinated notes (Details) € in Millions, $ in Millions			12 Months Ended
	Feb. 26, 2025 EUR (€)	Nov. 22, 2024 EUR (€)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2025 EUR (€)	Dec. 31, 2024 EUR (€)	Nov. 19, 2024 EUR (€)	Dec. 31, 2023 EUR (€)	Jan. 17, 2022 EUR (€)	Jan. 25, 2021 EUR (€)	Sep. 04, 2020 EUR (€)	Apr. 04, 2019 EUR (€)	Oct. 06, 2016 EUR (€)	Feb. 26, 2015 EUR (€)
Shareholders' equity
Amount of perpetual deeply subordinated notes recorded in equity \| $			$ 10,994
Coupons booked in deduction of shareholders' equity \| $			$ 320	$ 272	$ 294
Perpetual subordinated notes
Shareholders' equity
Notional amount						€ 9,750	€ 10,832		€ 11,250
Perpetual subordinated notes issued, 4.120%, callable after 5.25 years
Shareholders' equity
Notional amount						1,250	1,250	€ 1,250
Interest rate (as percent)								4.12%
Perpetual subordinated notes issued, 4.500%, callable after 10 years
Shareholders' equity
Notional amount						1,250	1,250	€ 1,250
Interest rate (as percent)								4.50%
Perpetual subordinated notes issued, 3.250%, callable after 15 years
Shareholders' equity
Notional amount						750	750		750	€ 750
Interest rate (as percent)										3.25%
Perpetual subordinated notes issued, 2.000%, callable after 5.25 years
Shareholders' equity
Notional amount						1,000	1,000		1,000	€ 1,000
Interest rate (as percent)										2.00%
Perpetual subordinated notes issued, 2.125%, callable after 12 years
Shareholders' equity
Notional amount						1,500	1,500		1,500		€ 1,500
Interest rate (as percent)											2.125%
Perpetual subordinated notes issued, 1.625%, callable after 7 years
Shareholders' equity
Notional amount						1,500	1,500		1,500		€ 1,500
Interest rate (as percent)											1.625%
Perpetual subordinated notes issued, 2.000%, callable after 10 years
Shareholders' equity
Notional amount						1,000	1,000		1,000			€ 1,000
Interest rate (as percent)												2.00%
Perpetual subordinated notes issued, 1.750%, callable after 5 years
Shareholders' equity
Notional amount									1,500				€ 1,500
Interest rate (as percent)													1.75%
Perpetual subordinated notes issued 3.369%, callable after 10 years
Shareholders' equity
Notional amount						€ 1,500	1,500		1,500					€ 1,500
Interest rate (as percent)														3.369%
Perpetual subordinated notes issued, 2.708%, callable after 6.6 years
Shareholders' equity
Notional amount														€ 1,000
Interest rate (as percent)														2.708%
Perpetual subordinated notes issued, 2.625%, callable after 10 years
Shareholders' equity
Notional amount							€ 1,082		€ 2,500						€ 2,500
Interest rate (as percent)	2.625%														2.625%
Amount repaid	€ 1,082	€ 1,418