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Transocean Proxy Statement and 2010 Annual Report

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Note 13—Postemployment Benefit Plans<br />

TRANSOCEAN LTD. AND SUBSIDIARIES<br />

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — Continued<br />

Defined benefit pension plans <strong>and</strong> other postretirement employee benefit plans<br />

Overview—We maintain a single qualified defined benefit pension plan in the U.S. (the “U.S. Plan”) <strong>and</strong> a single funded<br />

supplemental benefit plan (the “Supplemental Plan”). The U.S. Plan covers substantially all U.S. employees, <strong>and</strong> the Supplemental Plan,<br />

along with two other unfunded supplemental benefit plans (the “Other Supplemental Plans”), provide certain eligible employees with<br />

benefits in excess of those allowed under the U.S. Plan. Additionally, we maintain two funded <strong>and</strong> two unfunded defined benefit plans<br />

(collectively, the “Frozen Plans”) that we assumed in connection with our mergers with GlobalSantaFe <strong>and</strong> R&B Falcon, all of which were<br />

frozen prior to the respective mergers <strong>and</strong> for which benefits no longer accrue but the pension obligations have not been fully distributed.<br />

We refer to the U.S. Plan, the Supplemental Plan, the Other Supplemental Plans <strong>and</strong> the Frozen Plans, collectively, as the “U.S. Plans.”<br />

We maintain a defined benefit plan in the U.K. (the “U.K. Plan”) covering certain current <strong>and</strong> former employees in the U.K. We<br />

also provide several funded defined benefit plans, primarily group pension schemes with life insurance companies, <strong>and</strong> two unfunded<br />

plans, covering our eligible Norway employees <strong>and</strong> former employees (the “Norway Plans”). We also maintain unfunded defined benefit<br />

plans (the “Other Plans”) that provide retirement <strong>and</strong> severance benefits for certain of our Indonesian, Nigerian <strong>and</strong> Egyptian employees.<br />

We refer to the U.K. Plan, the Norway Plans <strong>and</strong> the Other Plans, collectively, as the “Non-U.S. Plans.”<br />

We refer to the U.S. Plans <strong>and</strong> the Non-U.S. Plans, collectively, as the “<strong>Transocean</strong> Plans”. Additionally, we have several<br />

unfunded contributory <strong>and</strong> noncontributory other postretirement employee benefits plans (the “OPEB Plans”) covering substantially all of<br />

our U.S. employees.<br />

Assumptions—The following were the weighted-average assumptions used to determine benefit obligations:<br />

U.S.<br />

Plans<br />

AR-97<br />

December 31, <strong>2010</strong> December 31, 2009<br />

Discount rate 5.48% 5.81% 4.92% 5.84 % 5.59% 5.52%<br />

Compensation trend rate 4.24% 4.65% n/a 4.21 % 4.73% n/a<br />

Non-U.S.<br />

Plans<br />

The following were the weighted-average assumptions used to determine net periodic benefit costs:<br />

OPEB<br />

Plans<br />

U.S.<br />

Plans<br />

Non-U.S.<br />

Plans<br />

Year ended December 31, <strong>2010</strong> Year ended December 31, 2009 Year ended December 31, 2008<br />

U.S.<br />

Plans<br />

Non-U.S.<br />

Plans<br />

OPEB<br />

Plans<br />

U.S.<br />

Plans<br />

Non-U.S.<br />

Plans<br />

OPEB<br />

Plans<br />

U.S.<br />

Plans<br />

OPEB<br />

Plans<br />

Non-U.S.<br />

Plans OPEB Plans<br />

Discount rate 5.86 % 5.67 % 5.51% 5.41% 6.06% 5.34% 6.14 % 5.97% 5.96%<br />

Expected rate of return 8.49 % 6.65 % n/a 8.50% 6.59% n/a 8.50 % 7.16% n/a<br />

Compensation trend rate<br />

Health care cost trend rate<br />

4.21 % 4.77 % n/a 4.21% 4.55% n/a 4.57 % 4.64% n/a<br />

-initial n/a n/a 8.00% n/a n/a 8.99% n/a n/a 8.55%<br />

-ultimate n/a n/a 5.00% n/a n/a 5.00% n/a n/a 5.00%<br />

-ultimate year n/a n/a 2016 n/a n/a 2016 n/a n/a 2014<br />

______________________________<br />

“n/a” means not applicable.

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