Retirement Plans

9 Months Ended

Feb. 29, 2016

(5) Retirement Plans

We sponsor programs that provide retirement benefits to most of our employees. These programs include defined benefit pension plans, defined contribution plans and postretirement healthcare plans. Key terms of our retirement plans are provided in our Annual Report. Our retirement plans costs for the periods ended February 29, 2016 and February 28, 2015 were as follows (in millions):

	Three Months Ended				Nine Months Ended
	2016		2015		2016		2015
Defined benefit pension plans	$	53	$	(10)	$	160	$	(27)
Defined contribution plans		104		96		304		284
Postretirement healthcare plans		20		21		61		61
	$	177	$	107	$	525	$	318

Net periodic benefit cost of the pension and postretirement healthcare plans for the periods ended February 29, 2016 and February 28, 2015 included the following components (in millions):

		Three Months Ended				Nine Months Ended
Pension Plans		2016		2015		2016		2015
	Service cost	$	166	$	165	$	497	$	493
	Interest cost		295		274		885		824
	Expected return on plan assets		(377)		(420)		(1,131)		(1,260)
	Amortization of prior service credit and other		(31)		(29)		(91)		(84)
		$	53	$	(10)	$	160	$	(27)


		Three Months Ended				Nine Months Ended
Postretirement Healthcare Plans		2016		2015		2016		2015
	Service cost	$	10	$	10	$	30	$	30
	Interest cost		10		11		31		31
		$	20	$	21	$	61	$	61

Contributions to our tax qualified U.S. domestic pension plans (“U.S. Pension Plans”) for the nine-month periods ended February 29, 2016 and February 28, 2015 were as follows (in millions):

	2016		2015
Required	$	8	$	380
Voluntary		487		115
	$	495	$	495

In March 2016, we made an additional voluntary contribution of $165 million to our U.S. Pension Plans. Our U.S. Pension Plans have ample funds to meet expected benefit payments.