WALGREEN CO | 2013 | FY | 3

The following table provides a reconciliation of the total amounts of unrecognized tax benefits (in millions):

 
 
2013
 
 
2012
 
 
2011
 
Balance at beginning of year
 
$
197
 
 
$
94
 
 
$
93
 
Gross increases related to tax positions in a prior period
 
 
18
 
 
 
100
 
 
 
25
 
Gross decreases related to tax positions in a prior period
 
 
(32
)
 
 
(49
)
 
 
(68
)
Gross increases related to tax positions in the current period
 
 
30
 
 
 
53
 
 
 
54
 
Settlements with taxing authorities
 
 
(2
)
 
 
(1
)
 
 
(8
)
Lapse of statute of limitations
 
 
(3
)
 
 
-
 
 
 
(2
)
Balance at end of year
 
$
208
 
 
$
197
 
 
$
94
 

us-gaap:SummaryOfDeferredTaxLiabilityNotRecognizedTextBlock