Consolidated Statements of Comprehensive Income - JPY (¥) ¥ in Millions	12 Months Ended
Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	¥ 547,279	¥ 127,561	¥ 209,715
Other comprehensive income, net of tax -
Unrealized gains (losses) on securities	1,070	(30,293)	2,220
Unrealized gains (losses) on derivative instruments	(1,184)	1,140	(1,198)
Pension liability adjustment	12,390	63,232	(171,753)
Foreign currency translation adjustments	(6,335)	(17,988)	(83,899)
Total comprehensive income (loss)	553,220	143,652	(44,915)
Less - Comprehensive income attributable to noncontrolling interests	60,403	35,814	75,329
Comprehensive income (loss) attributable to Sony Corporation's stockholders	¥ 492,817	¥ 107,838	¥ (120,244)

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss.

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Amount after tax and reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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