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Pension Plans | 3 Months Ended
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Mar. 31, 2018
Retirement Benefits [Abstract] |
PENSION PLANS | PENSION PLANS Total pension cost and employer contributions were as follows for the periods indicated (in millions):
| Three Months Ended March 31,
| 2018 |  | 2017
| U.S. |  | Foreign |  | U.S. |  | Foreign
Service cost | $ | 4 |  |  | $ | 3 |  |  | $ | 3 |  |  | $ | 3 |
Interest cost | 10 |  |  | 5 |  |  | 10 |  |  | 5 |
Expected return on plan assets | (16 | ) |  | (5 | ) |  | (17 | ) |  | (5 | )
Amortization of prior service cost | 1 |  |  | — |  |  | 1 |  |  | — |
Amortization of net loss | 5 |  |  | 1 |  |  | 5 |  |  | — |
Curtailment loss recognized | 1 |  |  | 2 |  |  | 4 |  |  | — |
Total pension cost | $ | 5 |  |  | $ | 6 |  |  | $ | 6 |  |  | $ | 3 |
| Three Months Ended March 31, 2018 |  | Remainder of 2018 (Expected)
| U.S. |  | Foreign |  | U.S. |  | Foreign
Total employer contributions | $ | 38 |  |  | $ | 3 |  |  | $ | — |  |  | $ | 9 |

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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 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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