2.	Landfill and Environmental Remediation Liabilities

Liabilities for landfill and environmental remediation costs are presented in the table below (in millions):


	June 30, 2016						December 31, 2015
	Landfill		Environmental Remediation		Total		Landfill		Environmental Remediation		Total
Current (in accrued liabilities)	$	116	$	31	$	147	$	112	$	31	$	143
Long-term		1,440		182		1,622		1,406		178		1,584

	$	1,556	$	213	$	1,769	$	1,518	$	209	$	1,727

The changes to landfill and environmental remediation liabilities for the six months ended June 30, 2016 are reflected in the table below (in millions):


	Landfill			Environmental Remediation
December 31, 2015	$	1,518		$	209
Obligations incurred and capitalized		29			—
Obligations settled		(40	)		(10	)
Interest accretion		44			2
Revisions in estimates and interest rate assumptions(a)		1			12
Acquisitions, divestitures and other adjustments		4			—

June 30, 2016	$	1,556		$	213

(a)

The amount reported in 2016 for our environmental remediation liabilities includes the impact of a decrease in the risk-free discount rate used to measure our liabilities from 2.25% at December 31, 2015 to 1.50% at June 30, 2016, resulting in an increase of $9 million to our environmental remediation liabilities and a corresponding increase to “Operating” expenses.

At several of our landfills, we provide financial assurance by depositing cash into restricted trust funds or escrow accounts for purposes of settling final capping, closure, post-closure and environmental remediation obligations. Generally, these trust funds are established to comply with statutory requirements and operating agreements. See Note 14 for additional information related to these trusts.