Receivables (Tables)

12 Months Ended

Dec. 31, 2015

Transfers and Servicing [Abstract]

Schedule of Allowance for Doubtful Accounts

The following table details the changes in the allowance for doubtful accounts related to customer receivables and other receivables:

	Customer receivables									Other receivables
December 31,	2015			2014			2013			2015			2014			2013
Balance at beginning of year	$	14		$	20		$	39		$	41		$	47		$	74
Provision for doubtful accounts		5			2			3			8			8			29
Write off of uncollectible accounts		(4	)		(3	)		(19	)		(2	)		(4	)		(39	)
Recoveries of prior write-offs		-			(2	)		(3	)		1			(7	)		(10	)
Other		(2	)		(3	)		-			1			(3	)		(7	)
Balance at end of year	$	13		$	14		$	20		$	49		$	41		$	47