Consolidated Statements of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	12 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 148us-gaap_ProfitLoss	$ 104us-gaap_ProfitLoss	$ 203us-gaap_ProfitLoss
Other comprehensive (loss) income:
Currency translation adjustment	(304)	120	(53)
Change in fair value of effective portion of hedges, net	(44)	(21)	5
Change in pension and other benefits, net	(209)	120	(44)
Other comprehensive (loss) income before income tax effect	(557)	219	(92)
Income tax (benefit) provision related to items of other comprehensive (loss) income	(72)	44	(15)
Other comprehensive (loss) income, net of tax	(485)	175	(77)
Comprehensive (loss) income	(337)	279	126
Less: Comprehensive (loss) income attributable to noncontrolling interest, net of tax	(15)	(2)	1
Comprehensive (loss) income attributable to our common shareholder	$ (322)us-gaap_ComprehensiveIncomeNetOfTax	$ 281us-gaap_ComprehensiveIncomeNetOfTax	$ 125us-gaap_ComprehensiveIncomeNetOfTax

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Other Comprehensive Income

-URI http://asc.fasb.org/extlink&oid=6519514

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 220

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Amount before tax, after reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans, attributable to parent entity.

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Amount before tax, after 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), attributable to parent entity.

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Amount before tax, after reclassification adjustments of gain (loss) on foreign currency translation adjustments, on 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, attributable to parent entity.

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Amount before tax of other comprehensive income (loss) attributable to parent entity.

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Amount after tax of other comprehensive income (loss) attributable to noncontrolling interests.

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Amount of tax expense (benefit) allocated to other comprehensive income (loss) attributable to parent entity.

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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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