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Pension Benefits - Schedule Of Projected Benefit Obligation, Accumulated Benefit Obligation And Fair Value Of Plan Assets For Pension Plans (Details) - Pension Plans, Defined Benefit - USD ($) $ in Millions	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
United States
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 439	$ 485	$ 513
Accumulated benefit obligation	439	485
Fair value of plan assets	322	335	293
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	990	1,035	943
Accumulated benefit obligation	949	990
Fair value of plan assets	$ 642	$ 687	$ 623

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- Definition

Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

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Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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