Accumulated Other Comprehensive Income (Loss) (Tables)

6 Months Ended

Sep. 30, 2019

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Components of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The changes in accumulated other comprehensive income (loss) by component, net of tax, for the three months ended September 30, 2019 and 2018 are as follows (in millions):

	Unrealized Net Gains (Losses) on Available-for-Sale Securities			Unrealized Net Gains (Losses) on Derivative Instruments			Foreign Currency Translation Adjustments			Total
Balances as of June 30, 2019	$	2		$	31		$	(50	)	$	(17	)
Other comprehensive income (loss) before reclassifications	1			40			(9		)	32
Amounts reclassified from accumulated other comprehensive income (loss)	(1		)	(24		)	—			(25		)
Total other comprehensive income (loss), net of tax	—			16			(9		)	7
Balances as of September 30, 2019	$	2		$	47		$	(59	)	$	(10	)

	Unrealized Net Gains (Losses) on Available-for-Sale Securities			Unrealized Net Gains (Losses) on Derivative Instruments		Foreign Currency Translation Adjustments			Total
Balances as of June 30, 2018	$	(8	)	$	27	$	(45	)	$	(26	)
Other comprehensive income (loss) before reclassifications	1			2		3			6
Amounts reclassified from accumulated other comprehensive income (loss)	—			1		—			1
Total other comprehensive income (loss), net of tax	1			3		3			7
Balances as of September 30, 2018	$	(7	)	$	30	$	(42	)	$	(19	)

The changes in accumulated other comprehensive income (loss) by component, net of tax, for the six months ended September 30, 2019 and 2018 are as follows (in millions):

	Unrealized Net Gains (Losses) on Available-for-Sale Securities			Unrealized Net Gains (Losses) on Derivative Instruments			Foreign Currency Translation Adjustments			Total
Balances as of March 31, 2019	$	(1	)	$	22		$	(51	)	$	(30	)
Other comprehensive income (loss) before reclassifications	4			59			(8		)	55
Amounts reclassified from accumulated other comprehensive income (loss)	(1		)	(34		)	—			(35		)
Total other comprehensive income (loss), net of tax	3			25			(8		)	20
Balances as of September 30, 2019	$	2		$	47		$	(59	)	$	(10	)

	Unrealized Net Gains (Losses) on Available-for-Sale Securities			Unrealized Net Gains (Losses) on Derivative Instruments			Foreign Currency Translation Adjustments			Total
Balances as of March 31, 2018	$	(8	)	$	(89	)	$	(30	)	$	(127	)
Cumulative-effect adjustment from the adoption of ASC 606	—			22			—			22
Cumulative-effect adjustment from the adoption of ASU 2018-02	—			1			—			1
Balances as of April 1, 2018	(8		)	(66		)	(30		)	(104		)
Other comprehensive income (loss) before reclassifications	1			80			(12		)	69
Amounts reclassified from accumulated other comprehensive income (loss)	—			16			—			16
Total other comprehensive income (loss), net of tax	1			96			(12		)	85
Balances as of September 30, 2018	$	(7	)	$	30		$	(42	)	$	(19	)

Reclassification out of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The effects on net income of amounts reclassified from accumulated other comprehensive income (loss) for the three and six months ended September 30, 2019 were as follows (in millions):

	Amount Reclassified From Accumulated Other Comprehensive Income (Loss)
Statement of Operations Classification	Three Months Ended September 30, 2019			Six Months Ended September 30, 2019
(Gains) losses on foreign currency forward contracts designated as cash flow hedges
Net revenue	$	(25	)	$	(41	)
Research and development	1			7
Total, net of tax	$	(24	)	$	(34	)

The effects on net income of amounts reclassified from accumulated other comprehensive income (loss) for the three and six months ended September 30, 2018 were as follows (in millions):

	Amount Reclassified From Accumulated Other Comprehensive Income (Loss)
Statement of Operations Classification	Three Months Ended September 30, 2018			Six Months Ended September 30, 2018
(Gains) losses on foreign currency forward contracts designated as cash flow hedges
Net revenue	$	(2	)	$	12
Research and development	3			4
Total net (gain) loss reclassified, net of tax	$	1		$	16