Accounts Receivable

12 Months Ended

Dec. 31, 2011

Accounts Receivable [Abstract]

Accounts Receivable

Note 5. Accounts Receivable

Transactions affecting the allowance for doubtful accounts during the years ended December 31, 2011, 2010 and 2009 were as follows:

	2011			2010			2009
Balance, beginning of year	$	71.0		$	70.3		$	80.5
Provisions charged to expense		18.8			22.8			19.7
Write-offs and other		(27.2	)		(22.1	)		(29.9	)
Balance, end of year	$	62.6		$	71.0		$	70.3