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Benefit Plans - Pension amounts recognized (Details) - Pension Plan - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Amounts recognized in accumulated other comprehensive loss, excluding tax effects, that have not yet been recognized as components of net periodic benefit cost |  |  |
Accumulated benefit obligation | $ 543 | $ 603 |
US |  |  |
Amounts recognized in the Consolidated Balance Sheets |  |  |
Non-current asset | 7 | 23 |
Current liabilities | (1) | (2) |
Non-current liabilities | (10) | (10) |
Net asset (liability) recognized | (4) | 11 |
Amounts recognized in accumulated other comprehensive loss, excluding tax effects, that have not yet been recognized as components of net periodic benefit cost |  |  |
Net actuarial loss | 40 | 21 |
Prior service cost | (6) | (6) |
Net amount recognized | 34 | 15 |
Information about plan obligations and assets for plans with an accumulated benefit obligation in excess of plan assets |  |  |
Projected benefit obligation | 11 | 12 |
Accumulated benefit obligation | 9 | 11 |
Components of net periodic benefit cost |  |  |
Service cost | 6 | 6 | $ 6
Interest cost | 13 | 13 | 14
Expected return on plan assets | (21) | (21) | (20)
Amortization of actuarial loss |  |  | 1
Amortization of prior service credit |  | (1) |
Net periodic benefit cost | (2) | (3) | 1
Amount related to the amortization of the entity's accumulated actuarial loss included in accumulated other comprehensive loss that will be recognized in net pension expense in next fiscal year | 1 |  |
Amounts recorded in other comprehensive income and net periodic benefit cost |  |  |
Net actuarial loss (gain) | 19 | (7) | 10
Prior service cost |  |  | (6)
Amortization of actuarial loss |  |  | (1)
Amortization of prior service credit |  | 1 |
Total recorded in other comprehensive income | 19 | (6) | 3
Net periodic benefit cost | (2) | (3) | 1
Total recorded in other comprehensive income and net periodic benefit cost | 17 | (9) | 4
Non-US |  |  |
Amounts recognized in the Consolidated Balance Sheets |  |  |
Non-current asset | 32 | 37 |
Current liabilities | (1) | (1) |
Non-current liabilities | (47) | (49) |
Net asset (liability) recognized | (16) | (13) |
Amounts recognized in accumulated other comprehensive loss, excluding tax effects, that have not yet been recognized as components of net periodic benefit cost |  |  |
Net actuarial loss | 57 | 55 |
Transition obligation | 1 | 1 |
Prior service cost | (1) | (1) |
Net amount recognized | 57 | 55 |
Information about plan obligations and assets for plans with an accumulated benefit obligation in excess of plan assets |  |  |
Projected benefit obligation | 49 | 51 |
Accumulated benefit obligation | 41 | 41 |
Fair value of plan assets | 2 | 2 |
Components of net periodic benefit cost |  |  |
Service cost | 3 | 3 | 3
Interest cost | 10 | 11 | 10
Expected return on plan assets | (9) | (10) | (10)
Amortization of actuarial loss | 2 | 2 | 2
Settlement loss |  |  | 1
Net periodic benefit cost | 6 | 6 | 6
Amount related to the amortization of the entity's accumulated actuarial loss included in accumulated other comprehensive loss that will be recognized in net pension expense in next fiscal year | (2) |  |
Amounts recorded in other comprehensive income and net periodic benefit cost |  |  |
Net actuarial loss (gain) | 4 | (3) | 6
Prior service cost |  |  | (1)
Amortization of actuarial loss | (2) | (2) | (2)
Total recorded in other comprehensive income | 2 | (5) | 3
Net periodic benefit cost | 6 | 6 | 6
Total recorded in other comprehensive income and net periodic benefit cost | $ 8 | $ 1 | $ 9

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