DTE Energy 2014 Annual Report Download - page 103
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Assumptions used in determining the accumulated postretirement benefit obligation and net other postretirement benefit costs are listed below:
Discount rate
4.95%
4.15%
Health care trend rate pre- and post- 65
7.50 / 6.50%
7.00%
Ultimate health care trend rate
4.50%
5.00%
Year in which ultimate reached pre- and post- 65
2025 / 2024
2021
Discount rate (prior to interim remeasurement)
4.15%
5.00%
Discount rate (post interim remeasurement)
4.30%
N/A
Expected long-term rate of return on plan assets
8.25%
8.25%
Health care trend rate pre- and post- 65
7.00%
7.00%
Ultimate health care trend rate
5.00%
5.00%
Year in which ultimate reached pre- and post- 65
2021
2020
A one percentage point increase in health care cost trend rates would have increased the total service cost and interest cost components of benefit costs
by $8 million in 2014 and increased the accumulated benefit obligation by $108 million at December 31, 2014. A one percentage point decrease in the
health care cost trend rates would have decreased the total service and interest cost components of benefit costs by $7 million in 2014 and would have
decreased the accumulated benefit obligation by $94 million at December 31, 2014.
The process used in determining the long-term rate of return for assets and the investment approach for the Company’s other postretirement benefits
plans is similar to those previously described for its pension plans.
Target allocations for other postretirement benefit plan assets as of December 31, 2014 are listed below:
U.S. Large Cap Equity Securities
U.S. Small Cap and Mid Cap Equity Securities
Non U.S. Equity Securities
Fixed Income Securities
Hedge Funds and Similar Investments
Private Equity and Other
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