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Retirement Benefits
 9 Months Ended
Sep. 30, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]  
Retirement Benefits [Text Block]
Note 9: Retirement Benefits
Net pension and retiree health benefit (income) cost included the following components:
 
Defined Benefit Pension Plans
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2016
 
2015
 
2016
 
2015
Components of net periodic benefit cost:
 
 
 
 
 
 
 
Service cost
$
70.2

 
$
82.8

 
$
212.2

 
$
245.3

Interest cost
104.2

 
117.1

 
314.4

 
351.4

Expected return on plan assets
(187.6
)
 
(195.7
)
 
(566.7
)
 
(579.7
)
Amortization of prior service cost
2.9

 
2.5

 
8.6

 
7.6

Recognized actuarial loss
71.0

 
91.5

 
213.4

 
274.8

Net periodic benefit cost
$
60.7

 
$
98.2

 
$
181.9

 
$
299.4


 
Retiree Health Benefit Plans
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2016
 
2015
 
2016
 
2015
Components of net periodic benefit income:
 
 
 
 
 
 
 
Service cost
$
9.7

 
$
10.5

 
$
29.3

 
$
31.5

Interest cost
13.0

 
15.3

 
39.0

 
46.0

Expected return on plan assets
(37.6
)
 
(37.1
)
 
(112.7
)
 
(111.3
)
Amortization of prior service benefit
(21.5
)
 
(21.6
)
 
(64.3
)
 
(64.8
)
Recognized actuarial loss
5.2

 
9.4

 
15.5

 
28.3

Net periodic benefit income
$
(31.2
)
 
$
(23.5
)
 
$
(93.2
)
 
$
(70.3
)

We have contributed approximately $35 million required to satisfy minimum funding requirements to our defined benefit pension and retiree health benefit plans during the nine months ended September 30, 2016. Additional discretionary funding in the aggregate was not material during the nine months ended September 30, 2016. During the remainder of 2016, we expect to make contributions to our defined benefit pension and retiree health benefit plans of approximately $15 million to satisfy minimum funding requirements. Additional discretionary funding for the remainder of 2016 is not expected to be material.