			Additions

Description	Balance at beginning of period		Charged to costs and expenses			Charged to other accounts^(b)			Deductions from reserves			Balance at end of period
FOR THE YEAR ENDED DECEMBER 31, 2009
Allowances for doubtful accounts ^(a)	$	291		75			84			(100)	^(c)	$	350
Allowance for secured advances to suppliers	$	37		21			17			—		$	75
Allowances for recoverable taxes	$	104		34			31			(5	)	$	164
Income tax valuation allowances	$	94		50			5			(33	)	$	116
FOR THE YEAR ENDED DECEMBER 31, 2010
Allowances for doubtful accounts ^(a)	$	350		58			3			(111)	^(c)	$	300
Allowance for secured advances to suppliers	$	75		17			3			(8	)	$	87
Allowances for recoverable taxes	$	164		20			(20	)		(46)	^(e)	$	118
Income tax valuation allowances	$	116		128			1			—		$	245
FOR THE YEAR ENDED DECEMBER 31, 2011
Allowances for doubtful accounts ^(a)	$	300		62			(23	)		(92)	^(c)	$	247
Allowance for secured advances to suppliers	$	87		6			(9	)		(11	)	$	73
Allowances for recoverable taxes	$	118		14			(6	)		(28	)	$	98
Income tax valuation allowances	$	245		(11	)		(47)	^(d)		—		$	187

^(a): This includes an allowance for doubtful accounts for current and non-current trade accounts receivables.
^(b): This consists primarily of foreign exchange translation adjustments.
^(c): Such amounts include write-offs of uncollectible accounts and recoveries.
^(d): This includes a deferred tax asset adjustment.
^(e): This includes $39 million related to the sale of the Brazilian fertilizer nutrients assets.