Acquisitions - Unaudited Supplemental Pro Forma Financial Information (Detail) - EMI Music Publishing - JPY (¥) ¥ / shares in Units, ¥ in Millions	12 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Net sales	¥ 8,738,209	¥ 8,612,280
Operating income	801,973	854,786
Net income attributable to Sony Corporation's stockholders	¥ 817,629	¥ 584,019
- Basic EPS	¥ 645.53	¥ 462.08
- Diluted EPS	¥ 631.55	¥ 451.88

Business Acquisition, Pro Forma Operating Income (Loss)

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- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(3)
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-Publisher FASB
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The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
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-Subparagraph (h)(2)
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