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Lease Obligations (Tables)
12 Months Ended
Mar. 31, 2017
Leases, Operating [Abstract]  
Schedule of future minimum rental payments for operating leases
At March 31, 2017, future minimum lease payments required under operating leases that have initial or remaining noncancelable lease terms in excess of one year for years ending March 31 are:
(In millions)
Noncancelable
Operating
Leases
2018
$
477

2019
414

2020
315

2021
264

2022
231

Thereafter
932

Total minimum lease payments (1)
$
2,633


(1)
Amount includes future minimum lease payments for the sale-leaseback transaction of $45 million. Minimum lease payments have not been reduced by minimum sublease rentals of $51 million due under future noncancelable subleases.