PG&E 2007 Annual Report Download - page 124
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122
The estimated amounts that will be amortized into net periodic benefi t cost in 2008 are as follows:
(in millions) PG&E Corporation Utility
Pension benefi ts:
Unrecognized prior service cost $ 47 $ 48
Unrecognized net loss 1 —
Total $ 48 $ 48
Other benefi ts:
Unrecognized prior service cost $ 16 $ 16
Unrecognized net gain (17) (17)
Unrecognized net transition obligation 26 26
Total $ 25 $ 25
VALUATION ASSUMPTIONS
The following actuarial assumptions were used in determining the projected benefi t obligations and the net periodic cost.
Weighted average year-end assumptions were used in determining the plans’ projected benefi t obligations, while prior year-end
assumptions are used to compute net benefi t cost.
Pension Benefi ts Other Benefi ts
December 31, December 31,
2007 2006 2005 2007 2006 2005
Discount rate 6.31% 5.90% 5.60% 5.52–6.42% 5.50–6.00% 5.20–5.65%
Average rate of future compensation increases 5.00% 5.00% 5.00% — — —
Expected return on plan assets 7.40% 8.00% 8.00% 7.00–7.50% 7.30–8.20% 7.60–8.40%
The assumed health care cost trend rate for 2007
is approximately 8%, decreasing gradually to an ultimate
trend rate in 2011 and beyond of approximately 5%.
A one-percentage point change in assumed health care
cost trend rate would have the following effects:
One-Percentage One-Percentage
(in millions) Point Increase Point Decrease
Effect on postretirement
benefi t obligation $72 $(59)
Effect on service and interest cost 8 (6)
Expected rates of return on plan assets were developed
by determining projected stock and bond returns and then
applying these returns to the target asset allocations of the
employee benefi t trusts, resulting in a weighted average rate
of return on plan assets. Fixed income returns were projected
based on real maturity and credit spreads added to a long-
term infl ation rate. Equity returns were estimated based on
estimates of dividend yield and real earnings growth added
to a long-term rate of infl ation. For the Utility pension plan,
the assumed return of 7.4% compares to a ten-year actual
return of 7.9%. The rate used to discount pension and other
post-retirement benefi t plan liabilities was based on a yield
curve developed from market data of over 500 Aa-grade
non-callable bonds at December 31, 2007. This yield curve
has discount rates that vary based on the duration of the
obligations. The estimated future cash fl ows for the pension
and other benefi t obligations were matched to the corre-
sponding rates on the yield curve to derive a weighted
average discount rate.
The difference between actual and expected return on
plan assets is included in net amortization and deferral,
and is considered in the determination of future net benefi t
income (cost). The actual return on plan assets was above
the expected return in 2007, 2006, and 2005.