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Employee Retirement Plans | 9 Months Ended
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Sep. 30, 2017
Compensation and Retirement Disclosure [Abstract] |
Employee Retirement Plans | EMPLOYEE RETIREMENT PLANS Net periodic pension cost for our defined-benefit pension plans was as follows, in millions:
| Three Months Ended September 30,
| 2017 |  | 2016
| Qualified |  | Non-Qualified |  | Qualified |  | Non-Qualified
Service cost | $ | 1 |  |  | $ | — |  |  | $ | 1 |  |  | $ | — |
Interest cost | 11 |  |  | 2 |  |  | 13 |  |  | 1 |
Expected return on plan assets | (12 | ) |  | — |  |  | (15 | ) |  | — |
Amortization of net loss | 5 |  |  | 1 |  |  | 5 |  |  | 1 |
Net periodic pension cost | $ | 5 |  |  | $ | 3 |  |  | $ | 4 |  |  | $ | 2 |
| Nine Months Ended September 30,
| 2017 |  | 2016
| Qualified |  | Non-Qualified |  | Qualified |  | Non-Qualified
Service cost | $ | 2 |  |  | $ | — |  |  | $ | 2 |  |  | $ | — |
Interest cost | 36 |  |  | 5 |  |  | 34 |  |  | 5 |
Expected return on plan assets | (36 | ) |  | — |  |  | (34 | ) |  | — |
Amortization of net loss | 15 |  |  | 2 |  |  | 12 |  |  | 2 |
Net periodic pension cost | $ | 17 |  |  | $ | 7 |  |  | $ | 14 |  |  | $ | 7 |
As of January 1, 2010, substantially all of our domestic and foreign qualified and domestic non-qualified defined benefit pension plans were frozen to future benefit accruals.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2410-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39675-114964 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66047640&loc=d3e39622-114963 + Details
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