Schedule of Future Minimum Rental Payments in Respect of Non-cancellable Operating Leases (Tables)

12 Months Ended

Mar. 31, 2018

Disclosure Of Finance Lease And Operating Lease By Lessee [Abstract]

Schedule of Future Minimum Rental Payments in Respect of Non-cancellable Operating Leases

The schedule of future minimum rental payments in respect of non-cancellable operating leases is set out below:

(Dollars in millions)
	As of
	March 31, 2018	March 31, 2017
Within one year of the balance sheet date	70	71
Due in a period between one year and five years	213	191
Due after five years	134	114