Accrued interest on convertible notes.

No definition available.

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- Definition

Convertible notes due date.

+ References

No definition available.

+ Details

Name:	ck0001639920_ConvertibleNotesDueDate
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- Definition

Disclosure of convertible notes and borrowings.

+ References

No definition available.

+ Details

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- Definition

Discount on conversion price per share.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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- Definition

Fair value adjustment recognized in finance expense.

+ References

No definition available.

+ Details

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- Definition

Fair value of ordinary shares at exchange.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Increase in other paid in capital upon conversion of convertible instruments.

+ References

No definition available.

+ Details

Name:	ck0001639920_IncreaseInOtherPaidInCapitalUponConversionOfConvertibleInstruments
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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

Incremental interest in discount on conversion price per share.

+ References

No definition available.

+ Details

Name:	ck0001639920_IncrementalIncreaseInDiscountOnConversionPricePerShare
Namespace Prefix:	ck0001639920_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Incremental interest rate on convertible notes issued.

+ References

No definition available.

+ Details

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Namespace Prefix:	ck0001639920_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Principal amount annualized return.

+ References

No definition available.

+ Details

Name:	ck0001639920_PrincipalAmountAnnualizedReturn
Namespace Prefix:	ck0001639920_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Principal amount of convertible notes exchanged.

+ References

No definition available.

+ Details

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Namespace Prefix:	ck0001639920_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Principal amount of convertible notes issued.

+ References

No definition available.

+ Details

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Namespace Prefix:	ck0001639920_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Specified conversion time frame before increase in discount on conversion price per share.

+ References

No definition available.

+ Details

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Namespace Prefix:	ck0001639920_
Data Type:	xbrli:durationItemType
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Period Type:	duration

- Definition

Starting interest rate on convertible notes issued.

+ References

No definition available.

+ Details

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Namespace Prefix:	ck0001639920_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of interest and other costs that an entity incurs in connection with the borrowing of funds that are recognised as an expense.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2017-03-09

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of shares issued by the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 106
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_106_d&doctype=Standard
-URIDate 2017-03-09

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Period Type:	instant

Convertible Notes and Borrowings - Additional Information (Details) € in Millions, $ in Millions					1 Months Ended	12 Months Ended
	Apr. 03, 2018 EUR (€)	Dec. 29, 2017 USD ($) shares	Dec. 15, 2017 USD ($) shares	Apr. 01, 2016 USD ($)	Jan. 31, 2018 USD ($) shares	Dec. 31, 2018 USD ($)	Jan. 01, 2018 shares	Nov. 20, 2013 shares	Nov. 13, 2012 shares
Disclosure Of Convertible Notes And Borrowings [Abstract]
Principal amount of convertible notes				$ 1,000
Convertible notes due				2021
Convertible note interest rate				5.00%
Increase in Payment-in-kind interest rate basis				1.00%
Discount on conversion price per share				20.00%
Date of involuntary conversion event				12 months
Increase in discount rate				2.50%
Principal amount annualized return				10.00%
Transaction costs expensed in finance costs						$ 20
Convertible notes exchanged principal amount		$ 110	$ 301		$ 628
Convertible notes accrued interest		$ 10	$ 27
Ordinary shares issued \| shares		1,754,960	4,800,000		9,431,960		9,431,960	8,233,160	4,204,120
Fair value of ordinary shares at exchange		$ 211	$ 600
Fair value adjusted finance cost \| €	€ 123
Issuance of shares upon exchange of Convertible Notes \| €	€ 1,100