Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Changes to Net Insurance Liabilities

The changes to our net insurance liabilities for the three years ended December 31, 2015 are summarized below (in millions):

	Gross Claims Liability			Receivables Associated with Insured Claims(a)			Net Claims Liability
Balance, December 31, 2012	$	569		$	(202	)	$	367
Self-insurance expense (benefit)		177			(5	)		172
Cash (paid) received		(156	)		10			(146	)
Balance, December 31, 2013		590			(197	)		393
Self-insurance expense (benefit)		168			(9	)		159
Cash (paid) received		(161	)		23			(138	)
Balance, December 31, 2014		597			(183	)		414
Self-insurance expense (benefit)		202			(39	)		163
Cash (paid) received		(156	)		4			(152	)
Balance, December 31, 2015(b)	$	643		$	(218	)	$	425
Current portion at December 31, 2015	$	141		$	(20	)	$	121
Long-term portion at December 31, 2015	$	502		$	(198	)	$	304

(a) Amounts reported as receivables associated with insured claims are related to both paid and unpaid claims liabilities.

(b) We currently expect substantially all of our net claims liability to be settled in cash over the next five years.