2. Landfill and Environmental Remediation Liabilities

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


	March 31, 2019						December 31, 2018
			Environmental						Environmental
	Landfill		Remediation		Total		Landfill		Remediation		Total
Current (in accrued liabilities)	$	132	$	26	$	158	$	143	$	26	$	169
Long-term		1,659		207		1,866		1,617		211		1,828
	$	1,791	$	233	$	2,024	$	1,760	$	237	$	1,997

The changes to landfill and environmental remediation liabilities for the three months ended March 31, 2019 are reflected in the table below (in millions):


			Environmental
	Landfill		Remediation
December 31, 2018	$	1,760	$	237
Obligations incurred and capitalized		17		—
Obligations settled		(13)		(5)
Interest accretion		23		1
Revisions in estimates and interest rate assumptions		1		—
Acquisitions, divestitures and other adjustments		3		—
March 31, 2019	$	1,791	$	233

At several of our landfills, we provide financial assurance by depositing cash into restricted trust funds or escrow accounts for purposes of settling our 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.