2.	Landfill and Environmental Remediation Liabilities

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


	March 31, 2017						December 31, 2016
	Landfill		Environmental Remediation		Total		Landfill		Environmental Remediation		Total
Current (in accrued liabilities)	$	133	$	26	$	159	$	119	$	28	$	147
Long-term		1,475		217		1,692		1,457		218		1,675

	$	1,608	$	243	$	1,851	$	1,576	$	246	$	1,822

The changes to landfill and environmental remediation liabilities for the three months ended March 31, 2017 are reflected in the table below (in millions):


	Landfill			Environmental Remediation
December 31, 2016	$	1,576		$	246
Obligations incurred and capitalized		15			—
Obligations settled		(14	)		(4	)
Interest accretion		22			1
Revisions in estimates and interest rate assumptions		8			1
Acquisitions, divestitures and other adjustments		1			(1	)

March 31, 2017	$	1,608		$	243

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.