XML 30 R14.htm IDEA: XBRL DOCUMENT v3.7.0.1
Retirement Benefits (Unaudited)
 3 Months Ended
Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]  
RETIREMENT BENEFITS
RETIREMENT BENEFITS
The cost to the company of its retirement plans is shown in the following table:
 
Three Months Ended March 31
 
Pension
Benefits
 
Medical and
Life Benefits
$ in millions
2017
 
2016
 
2017
 
2016
Components of net periodic benefit cost
 
 
 
 
 
 
 
Service cost
$
114

 
$
112

 
$
6

 
$
8

Interest cost
309

 
321

 
21

 
24

Expected return on plan assets
(471
)
 
(463
)
 
(22
)
 
(21
)
Amortization of:
 
 
 
 
 
 
 
Prior service credit
(15
)
 
(15
)
 
(5
)
 
(6
)
Net loss from previous years
178

 
178

 
2

 
3

Net periodic benefit cost
$
115

 
$
133

 
$
2

 
$
8


Employer Contributions
The company sponsors defined benefit pension and post-retirement plans, as well as defined contribution plans. We fund our defined benefit pension plans annually in a manner consistent with the Employee Retirement Income Security Act of 1974, as amended by the Pension Protection Act of 2006.
Contributions made by the company to its retirement plans are as follows:
 
Three Months Ended March 31
$ in millions
2017
 
2016
Defined benefit pension plans
$
23

 
$
27

Medical and life benefit plans
11

 
11

Defined contribution plans
99

 
87