Commitments, Contingent Liabilities and Other - Additional Information (Detail) € in Millions, ¥ in Millions	1 Months Ended	12 Months Ended
Oct. 31, 2015 EUR (€)	Mar. 31, 2019 JPY (¥)
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments and other outstanding		¥ 593,338
Litigation case about optical disk drive business, fine from European Commission \| €	€ 31
Maximum potential amount of future payments under guarantees		2,531
Financial Services
Commitments and Contingencies Disclosure [Line Items]
Unused portion of lines of credit extended to customers		27,553
Pictures
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments and other outstanding		¥ 94,871
Purchase commitments and other outstanding, term		3 years
Music
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments and other outstanding		¥ 112,578
Purchase commitments and other outstanding, term		6 years
Game & Network Services
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments and other outstanding		¥ 11,027
Purchase commitments and other outstanding, term		1 year
Advertising and Promotional Rights
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments and other outstanding		¥ 10,132
Purchase commitments and other outstanding, term		2 years
Fixed Assets
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments and other outstanding		¥ 164,174
Materials
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments and other outstanding		¥ 125,164

Commitments and Contingencies Disclosure [Line Items]

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- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=115931803&loc=d3e12069-110248

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- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
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-Section 50
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Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
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-Section 50
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- Definition

Term of the unrecognized unconditional purchase obligation, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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Unused amount of commitments to extend credit to customers.

+ References

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