Derivative financial instruments (Tables)

12 Months Ended

Mar. 31, 2020

Fair Values of Derivative Financial Instruments

The following table summarizes the fair values of derivative financial instruments as of March 31, 2019 and 2020:

	Yen in millions
	March 31,
	2019			2020
Derivative assets
Derivative financial instruments designated as hedging instruments
Interest rate and currency swap agreements
Prepaid expenses and other current assets		—			—
Investments and other assets - Other		—			—
Total		—			—
Undesignated derivative financial instruments
Interest rate and currency swap agreements
Prepaid expenses and other current assets		74,971			105,724
Investments and other assets - Other		114,642			372,786
Total		189,613			478,510
Foreign exchange forward and option contracts
Prepaid expenses and other current assets		10,720			25,316
Investments and other assets - Other		—			—
Total		10,720			25,316
Total derivative assets		200,333			503,826
Counterparty netting		(89,364	)		(176,541	)
Collateral received		(46,590	)		(121,979	)
Carrying value of derivative assets		64,379			205,306
Derivative liabilities
Derivative financial instruments designated as hedging instruments
Interest rate and currency swap agreements
Other current liabilities		—			—
Other long-term liabilities		—			—
Total		—			—
Undesignated derivative financial instruments
Interest rate and currency swap agreements
Other current liabilities		(28,911	)		(76,492	)
Other long-term liabilities		(189,157	)		(343,271	)
Total		(218,068	)		(419,763	)
Foreign exchange forward and option contracts
Other current liabilities		(13,847	)		(17,245	)
Other long-term liabilities		—			—
Total		(13,847	)		(17,245	)
Total derivative liabilities		(231,915	)		(437,008	)
Counterparty netting		89,364			176,541
Collateral posted		110,159			234,937
Carrying value of derivative liabilities		(32,392	)		(25,530	)

Notional Amounts of Derivative Financial Instruments

The following table summarizes the notional amounts of derivative financial instruments as of March 31, 2019 and 2020:

	Yen in millions
	March 31,
	2019				2020
	Designated derivative financial instruments		Undesignated derivative financial instruments		Designated derivative financial instruments		Undesignated derivative financial instruments
Interest rate and currency swap agreements		—		21,001,883		—		20,310,018
Foreign exchange forward and option contracts		—		4,005,578		—		3,916,824
Total		—		25,007,461		—		24,226,842

Gains and Losses on Derivative Financial Instruments and Hedged Items Reported in Consolidated Statement of Income

The following table summarizes the gains and losses on derivative financial instruments and hedged items reported in the consolidated statements of income for the years ended March 31, 2018, 2019 and 2020:

	Yen in millions
	For the years ended March 31,
	2018					2019					2020
	Gains or (losses) on derivative financial instruments		Gains or (losses) on hedged items			Gains or (losses) on derivative financial instruments			Gains or (losses) on hedged items		Gains or (losses) on derivative financial instruments		Gains or (losses) on hedged items
Derivative financial instruments designated as hedging instruments
Interest rate and currency swap agreements
Cost of financing operations		782		(227	)		(822	)		799		—		—
Undesignated derivative financial instruments
Interest rate and currency swap agreements
Cost of financing operations		42,220					(18,433	)				51,552
Foreign exchange gain (loss), net		30,339					37,124					67,142
Foreign exchange forward and option  contracts
Cost of financing operations		6,442					2,240					33,538
Foreign exchange gain (loss), net		73,115					(69,826	)				8,281