VALERO ENERGY CORP/TX | 2013 | FY | 3

Rental expense was as follows (in millions):
 
Year Ended December 31,
 
2013
 
2012
 
2011
Minimum rental expense
$
574

 
$
508

 
$
523

Contingent rental expense
7

 
23

 
23

Total rental expense
581

 
531

 
546

Less sublease rental income
—

 
(2
)
 
(2
)
Net rental expense
$
581

 
$
529

 
$
544

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