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WESTERN DIGITAL CORPORATION
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
Other intangible assets are amortized on a straight-line basis over the respective estimated useful lives of the
assets. Amortization expense for intangible assets was $171 million, $213 million and $209 million for 2015, 2014
and 2013, respectively. During 2015 and 2014, the Company recorded $39 million and $53 million of impairment
charges related to intangible assets, respectively, which are recorded in the employee termination, asset impairment
and other charges within the Company’s consolidated statements of income. The impairment charges primarily relate
to acquired in-process research and development projects that were abandoned and resulted in full impairment in both
2015 and 2014. As of July 3, 2015, estimated future amortization expense for intangible assets currently subject to
amortization is $95 million for 2016, $64 million for 2017, $20 million for 2018, $11 million for 2019 and $10
million for 2020.
Note 14. Pensions and Other Post-retirement Benefit Plans
The Company has pension and other post-retirement benefit plans in various countries. The Company’s principal
plans are in Japan. All pension and other post-retirement benefit plans outside of the Company’s Japanese plans are
immaterial to the Company’s consolidated financial statements.
Obligations and Funded Status
The changes in the benefit obligations and plan assets for the Japanese defined benefit pension plans were as fol-
lows for 2015, 2014 and 2013 (in millions):
2015 2014 2013
Change in benefit obligation:
Benefit obligation at beginning of period ............................. $255 $234 $286
Service cost .................................................. 9 10 11
Interest cost ................................................. 4 4 5
Actuarial gain ................................................ 16 13 (4)
Benefits paid ................................................. (8) (7) (6)
Other(1) .................................................... — 8 —
Non-U.S. currency movement .................................... (45) (7) (58)
Benefit obligation at end of period .................................. 231 255 234
Change in plan assets:
Fair value of plan assets at beginning of period ......................... 191 167 167
Actual return on plan assets ..................................... 22 15 29
Employer contributions ........................................ 14 14 15
Benefits paid ................................................. (8) (7) (6)
Other(1) .................................................... — 7 —
Non-U.S. currency movement .................................... (34) (5) (38)
Fair value of plan assets at end of period .............................. 185 191 167
Unfunded status at end of year ....................................... $ 46 $ 64 $ 67
(1) During fiscal 2014 the Japan entity assumed benefit obligations and plan assets from Hitachi. These pension
obligations related to former Hitachi employees who were hired into the HGST Japan entity during or soon after
the 2012 acquisition of HGST by the Company.
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