2.	Landfill and Environmental Remediation Liabilities

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


	June 30, 2017						December 31, 2016
	Landfill		Environmental Remediation		Total		Landfill		Environmental Remediation		Total
Current (in accrued liabilities)	$	138	$	26	$	164	$	119	$	28	$	147
Long-term		1,493		219		1,712		1,457		218		1,675

	$	1,631	$	245	$	1,876	$	1,576	$	246	$	1,822

The changes to landfill and environmental remediation liabilities for the six months ended June 30, 2017 are reflected in the table below (in millions):


	Landfill			Environmental Remediation
December 31, 2016	$	1,576		$	246
Obligations incurred and capitalized		33			—
Obligations settled		(38	)		(10	)
Interest accretion		45			2
Revisions in estimates and interest rate assumptions		13			7
Acquisitions, divestitures and other adjustments		2			—

June 30, 2017	$	1,631		$	245

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 13 for additional information related to these trusts.