Note 12. Leases

We lease most of our store premises and some of our corporate facilities and distribution centers. These operating leases expire at various dates through 2030. Most store leases have a five-year base period and include options that allow us to extend the lease term beyond the initial base period, subject to terms agreed upon at lease inception. Some leases also include early termination options, which can be exercised under specific conditions.

The aggregate minimum non-cancelable annual lease payments under leases in effect on January 31, 2015 are as follows:



($ in millions)
Fiscal Year
2015	$	1,136
2016	1,096
2017	920
2018	760
2019	638
Thereafter	1,701
Total minimum lease commitments	$	6,251

The total minimum lease commitment amount above does not include minimum sublease rent income of $22 million receivable in the future under non-cancelable sublease agreements.

Rent expense related to our store premises, corporate facilities, and distribution centers under operating leases is as follows:



	Fiscal Year
($ in millions)	2014			2013			2012
Minimum rent expense	$	1,209		$	1,162		$	1,104
Contingent rent expense	114			121			123
Less: Sublease income	(4		)	(4		)	(4		)
Total	$	1,319		$	1,279		$	1,223