ALTRIA GROUP, INC. | 2013 | FY | 3

A reconciliation of the beginning and ending amount of unrecognized tax benefits for the years ended December 31, 2013, 2012 and 2011 was as follows: 
(in millions)
2013

 
2012

 
2011

Balance at beginning of year
$
262

 
$
381

 
$
399

Additions based on tax positions
related to the current year
15

 
15

 
22

Additions for tax positions of
prior years
35

 
170

 
71

Reductions for tax positions due to
lapse of statutes of limitations
(1
)
 
(16
)
 
(39
)
Reductions for tax positions of
prior years
—

 
(102
)
 
(67
)
Settlements
(84
)
 
(186
)
 
(5
)
Balance at end of year
$
227

 
$
262

 
$
381

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