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Employee Retirement Plans (Tables) | 6 Months Ended
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Jun. 30, 2013
Compensation And Retirement Disclosure [Abstract] |
Net Periodic Pension Cost for Defined-Benefit Pension Plans |
Net periodic pension cost for the Company’s defined-benefit pension plans was as follows, in millions:
|  | Three Months Ended June 30, |
|  | 2013 |  |  | 2012 |
|  | Qualified |  |  | Non-Qualified |  |  | Qualified |  |  | Non-Qualified |
Service cost |  | $ | 1 |  |  | $ | — |  |  | $ | 1 |  |  | $ | — |
Interest cost |  |  | 10 |  |  |  | 2 |  |  |  | 10 |  |  |  | 2 |
Expected return on plan assets |  |  | (9 | ) |  |  | — |  |  |  | (9 | ) |  |  | — |
Amortization of net loss |  |  | 4 |  |  |  | — |  |  |  | 4 |  |  |  | — |
Net periodic pension cost |  | $ | 6 |  |  | $ | 2 |  |  |  | 6 |  |  |  | 2 |
|  | Six Months Ended June 30, |
|  | 2013 |  |  | 2012 |
|  | Qualified |  |  | Non-Qualified |  |  | Qualified |  |  | Non-Qualified |
Service cost |  | $ | 2 |  |  | $ | — |  |  | $ | 3 |  |  | $ | — |
Interest cost |  |  | 20 |  |  |  | 3 |  |  |  | 20 |  |  |  | 3 |
Expected return on plan assets |  |  | (18 | ) |  |  | — |  |  |  | (17 | ) |  |  | — |
Amortization of net loss |  |  | 8 |  |  |  | 1 |  |  |  | 7 |  |  |  | 1 |
Net periodic pension cost |  | $ | 12 |  |  | $ | 4 |  |  | $ | 13 |  |  | $ | 4 |

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- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e2417-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=32704760&loc=d3e4179-114921 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e2439-114920 Reference 5: 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=28361610&loc=d3e2410-114920 + Details
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