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weyerhaeuser 1998 Annual Report
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on fixed amounts per hour per employee. Contributions to these plans were $5 million in 1998, $7 million in 1997 and $5 million in 1996.

The company sponsors multiple defined benefit postretirement plans for its U.S. employees. Medical plans have various levels of coverage and plan participant contributions. Life insurance plans are noncontributory. Canadian employees are covered under multiple defined benefit postretirement plans that provide medical and life insurance benefits.

Weyerhaeuser sponsors various defined contribution plans for US salaried and hourly employees. The basis for determining plan contribution varies by plan. The amounts charged to operations and contributed to the plans for participating employees were $37 million, $34 million and $32 million in 1998, 1997 and 1996, respectively.

 

  The assumptions used in the measurement of the company's benefit obligations are as follows:  
                           
   
Pension
Other
Postretirement
Benefits
 
   
1998
1997
1996
1998
1997
1996
 
                 
  Discount rate
7.25%
7.75%
7.75%
7.25%
7.75%
7.75%
 
  Expected return on plan assets
11.50%
11.50%
11.50%
5.75%
5.75%
5.75%
 
     
 
  Rate of compensation increase:
 
    Salaried
4.50%
4.50%
4.50%
4.50%
4.50%
4.50%
 
    Hourly  
3.00%
3.00%
3.00%
3.00%
3.00%
3.00%
 
                             

 

For measurement purposes, a 7.5 percent annual rate of increase in the per capita cost of covered health care benefits was assumed for 1998. Beginning in 1999, the rate is assumed to decrease by 0.5 percent annually to a level of 4.5 percent for the year 2004 and all years thereafter.

  The components of net periodic benefit costs are:  
                           
  Dollar amounts in millions
Pension
  Other   Postretirement   Benefits  
   
1998
1997
1996
1998
1997
1996
 
                         
  Service cost
$ 54
$ 56
$ 51
$ 4
$ 5
$ 5
 
  Interest cost
134
128
115
18
15
16
 
  Expected return on plan assets
(236)
(194)
(171)
--
--
--
 
  Amortization of (gain)/loss
(23)
8
14
(1)
(2)
(1)
 
  Amortization of prior service cost
14
10
7
--
--
--
 
  Amortization of unrecognized transition
(asset)/obligation
(4)
(4)
(4)
--
--
--
 
  (Gain)/loss due to closure, sale and other
1
1
2
--
--
--
 
   
$ (60)
$ 5
$ 14
$ 21
$ 18
$ 20
                           

 

The accrued (prepaid) pension costs for the projected benefit obligation, accumulated benefit obligation and fair value of plan assets for pension plan(s) with accumulated benefit obligations in excess of plan assets were $178 million, $203 million and $102 million, respectively, as of December 27, 1998, and $54 million, $81 million and $4 million, respectively, as of December 28, 1997.

Assumed health care cost trend rates have a significant effect on the amounts reported for the health care plans. A one percent change in assumed health care cost trend rates would have the following effects:


As of December 27, 1998
Dollar amounts in millions
1% Increase
1% Decrease
 
Effect on total of service and interest cost components
$ 1
$ (1)
Effect on accumulated postretirement benefit obligation
12
(11)
     
Note 7. Inventories    
     
Dollar amounts in millions
December 27, 1998
December 28, 1997
     
Logs and chips
$ 108
$ 103
Lumber, plywood and panels
143
154
Pulp, newsprint and paper
190
185
Containerboard, paperboard and packaging
96
107
Other products
150
152
Materials and supplies
275
282
 
$ 962
$ 983