Employee Retirement Plans

3 Months Ended

Mar. 31, 2018

Retirement Benefits [Abstract]

Employee Retirement Plans

Employee Retirement Plans

The components of net pension and postretirement benefit costs are summarized in the following table:

	Three months ended March 31,
(millions)	2018			2017
Pension:
Service cost of benefits earned	$	12		$	10
Interest cost on projected benefit obligation	16			16
Expected return on plan assets	(24		)	(23		)
Net amortization	8			5
Net pension cost	$	12		$	8
Postretirement:
Service cost of benefits earned	$	1		$	1
Interest cost on projected benefit obligation	1			1
Net amortization	(6		)	(6		)
Net postretirement benefit	$	(4	)	$	(4	)

Service cost of benefits earned is included in "Costs of products sold" and "Selling and administrative expenses" on our condensed consolidated statements of income. The other components of net pension and postretirement costs are included in "Other income, net".

During the first three months of 2018, we made cash contributions of $1 million to our domestic supplemental pension plan and $1 million to our pension plans in Canada. We expect to make total contributions to our pension plans in 2018 of approximately $60 million.