Post-Employment Benefits

9 Months Ended

Sep. 30, 2015

Post-Employment Benefits

Post-Employment Benefits

Note 9Post-Employment Benefits

The following is a summary of net periodic benefit costs relating to the company’s defined benefit and other post-employment plans for the three months ended September 30, 2015 and 2014:

	Defined benefit plans				Other post- employment plans
(in millions)	2015		2014		2015	2014
Service cost	$ 57		$ 44		$ 7	$ 7
Interest cost	54		55		6	6
Expected return on plan assets	(81	)	(75	)	—	—
Amortization of actuarial losses (gains) and prior service costs	31		16		—	(1	)
Net periodic benefit cost	$ 61		$ 40		$ 13	$ 12

The following is a summary of net periodic benefit costs relating to the company’s defined benefit and other post-employment plans for the nine months ended September 30, 2015 and 2014:

	Defined benefit plans				Other post- employment plans
(in millions)	2015		2014		2015	2014
Service cost	$ 171		$ 131		$ 19	$ 17
Interest cost	164		164		18	17
Expected return on plan assets	(244	)	(226	)	—	—
Amortization of actuarial losses (gains) and prior service costs	95		50		1	(3	)
Net periodic benefit cost	$ 186		$ 119		$ 38	$ 31

AbbVie made voluntary contributions of $150 million and $370 million in the nine months ended September 30, 2015 and 2014 to its main domestic defined benefit pension plan.