Lease Obligations (Tables)

12 Months Ended

Mar. 31, 2013

Leases, Operating [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

(In millions)	Noncancelable Operating Leases
2014	$	213
2015	165
2016	118
2017	90
2018	63
Thereafter	202
Total minimum lease payments (1)	$	851

(1) Minimum lease payments have not been reduced by minimum sublease rentals of $33 million due under future noncancelable subleases.