Accumulated Other Comprehensive Income (Loss) [Roll Forward]

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- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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- Definition

Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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- Definition

Amount after tax and reclassification adjustments of other comprehensive income (loss).

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- Definition

Amount after tax of reclassification adjustments of other comprehensive income (loss).

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Changes in Accumulated Other Comprehensive Income by Component (Details) - USD ($) $ in Millions		12 Months Ended
	Apr. 01, 2018	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax		$ (30)	$ (127)	$ (19)	$ (16)
Other comprehensive income (loss) before reclassifications		81	(107)	34
Amounts reclassified from accumulated other comprehensive income (loss)		(7)	(1)	(37)
Net current-period other comprehensive income (loss)		74	(108)	(3)
Unrealized Gains (Losses) on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax		(1)	(8)	(3)	1
Other comprehensive income (loss) before reclassifications		6	(9)	(3)
Amounts reclassified from accumulated other comprehensive income (loss)		1	4	(1)
Net current-period other comprehensive income (loss)		7	(5)	(4)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax		22	(89)	32	14
Other comprehensive income (loss) before reclassifications		96	(126)	54
Amounts reclassified from accumulated other comprehensive income (loss)		(8)	5	(36)
Net current-period other comprehensive income (loss)		88	(121)	18
Foreign Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax		(51)	(30)	(48)	$ (31)
Other comprehensive income (loss) before reclassifications		(21)	28	(17)
Amounts reclassified from accumulated other comprehensive income (loss)		0	(10)	0
Net current-period other comprehensive income (loss)		$ (21)	$ 18	$ (17)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 22
Other comprehensive income (loss) before reclassifications	22
ASU 2018-02 [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Amounts reclassified from accumulated other comprehensive income (loss)	1
Adjustments for adopted accounting pronouncements on April 1, 2018 [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(104)
Adjustments for adopted accounting pronouncements on April 1, 2018 [Member] \| Unrealized Gains (Losses) on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(8)
Adjustments for adopted accounting pronouncements on April 1, 2018 [Member] \| Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(66)
Adjustments for adopted accounting pronouncements on April 1, 2018 [Member] \| Foreign Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (30)