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Postretirement Benefit Plans (Tables) | 9 Months Ended
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Sep. 30, 2015
Compensation and Retirement Disclosure [Abstract] |
Components of net periodic benefit cost and other amounts recognized in other comprehensive income | The following table provides the components of net periodic benefit cost for our defined benefit pension plans, disaggregated by domestic and international plans.
| Three Months Ended |  | Nine Months Ended
| September 30, |  | September 30,
(in millions) | 2015 |  | 2014 |  | 2015 |  | 2014
Domestic defined benefit pension plans: |  |  |  |  |  |  |
Service cost | $ | 1 |  |  | $ | 1 |  |  | $ | 2 |  |  | $ | 2 |
Interest cost | 1 |  |  | — |  |  | 3 |  |  | 2 |
Expected return on plan assets | (2 | ) |  | (1 | ) |  | (4 | ) |  | (3 | )
Amortization of net actuarial loss | 1 |  |  | — |  |  | 2 |  |  | 1 |
Net periodic benefit cost | $ | 1 |  |  | $ | — |  |  | $ | 3 |  |  | $ | 2 |
International defined benefit pension plans: |  |  |  |  |  |  |
Service cost | $ | 3 |  |  | $ | 3 |  |  | $ | 9 |  |  | $ | 11 |
Interest cost | 6 |  |  | 8 |  |  | 18 |  |  | 22 |
Expected return on plan assets | (8 | ) |  | (8 | ) |  | (25 | ) |  | (25 | )
Amortization of net actuarial loss | 3 |  |  | 2 |  |  | 10 |  |  | 6 |
Net periodic benefit cost | $ | 4 |  |  | $ | 5 |  |  | $ | 12 |  |  | $ | 14 |
Total net periodic benefit cost | $ | 5 |  |  | $ | 5 |  |  | $ | 15 |  |  | $ | 16 |

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- Definition Tabular disclosure of the net gain (loss) and net prior service cost or credit recognized in other comprehensive income (loss) for the period for pension plans and/or other employee benefit plans, and reclassification adjustments of other comprehensive income (loss) for the period, as those amounts, including amortization of the net transition asset or obligation, are recognized as components of net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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