Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2013

Transactions Affecting Allowance for Doubtful Accounts

Transactions affecting the allowance for doubtful accounts receivable during the years ended December 31, 2013, 2012 and 2011 were as follows:

	2013			2012			2011
Balance, beginning of year	$	49.6		$	62.6		$	71.0
Provisions charged to expense		18.2			8.7			18.8
Write-offs and other		(23.0	)		(21.7	)		(27.2	)
Balance, end of year	$	44.8		$	49.6		$	62.6