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Pension and Other Postretirement Benefits - Pension plan assets by category and FV (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Fixed income index - Long government bond |  |  |
Plan assets |  |  |
Redemption notification period | 95 days |  |
Pension Plan | UNITED STATES |  |  |
Plan assets |  |  |
Fair value of plan assets | $ 420 | $ 439 | $ 408
Pension Plan | UNITED STATES | Equity index - U.S. |  |  |
Plan assets |  |  |
Fair value of plan assets | 37 | 45 |
Pension Plan | UNITED STATES | Equity index - International |  |  |
Plan assets |  |  |
Fair value of plan assets | 22 | 44 |
Pension Plan | UNITED STATES | Fixed income index- Long bond |  |  |
Plan assets |  |  |
Fair value of plan assets | $ 179 | $ 276 |
Pension Plan | UNITED STATES | Fixed income index- Long bond | Minimum |  |  |
Plan assets |  |  |
Fixed income securities maturity (in years) | 10 years | 10 years |
Pension Plan | UNITED STATES | Fixed income index - Long government bond |  |  |
Plan assets |  |  |
Fair value of plan assets | $ 109 | $ 69 |
Pension Plan | UNITED STATES | Fixed income index - Long government bond | Minimum |  |  |
Plan assets |  |  |
Fixed income securities maturity (in years) | 10 years | 10 years |
Pension Plan | UNITED STATES | Other. |  |  |
Plan assets |  |  |
Fair value of plan assets | $ 69 |  |
Pension Plan | UNITED STATES | Cash |  |  |
Plan assets |  |  |
Fair value of plan assets | 4 | $ 5 |
Pension Plan | UNITED STATES | NAV |  |  |
Plan assets |  |  |
Fair value of plan assets | 69 |  |
Pension Plan | UNITED STATES | NAV | Other. |  |  |
Plan assets |  |  |
Fair value of plan assets | 69 |  |
Pension Plan | UNITED STATES | Level 2 |  |  |
Plan assets |  |  |
Fair value of plan assets | 351 | 439 |
Pension Plan | UNITED STATES | Level 2 | Equity index - U.S. |  |  |
Plan assets |  |  |
Fair value of plan assets | 37 | 45 |
Pension Plan | UNITED STATES | Level 2 | Equity index - International |  |  |
Plan assets |  |  |
Fair value of plan assets | 22 | 44 |
Pension Plan | UNITED STATES | Level 2 | Fixed income index- Long bond |  |  |
Plan assets |  |  |
Fair value of plan assets | 179 | 276 |
Pension Plan | UNITED STATES | Level 2 | Fixed income index - Long government bond |  |  |
Plan assets |  |  |
Fair value of plan assets | 109 | 69 |
Pension Plan | UNITED STATES | Level 2 | Cash |  |  |
Plan assets |  |  |
Fair value of plan assets | 4 | 5 |
Pension Plan | Non-US |  |  |
Plan assets |  |  |
Fair value of plan assets | 244 | 249 | $ 231
Pension Plan | Non-US | Equity index - U.S. |  |  |
Plan assets |  |  |
Fair value of plan assets | 26 | 26 |
Pension Plan | Non-US | Equity index - International |  |  |
Plan assets |  |  |
Fair value of plan assets | 17 | 19 |
Pension Plan | Non-US | Fixed income index- Short bond |  |  |
Plan assets |  |  |
Fair value of plan assets | 34 | 31 |
Pension Plan | Non-US | Fixed income index - Intermediate bond |  |  |
Plan assets |  |  |
Fair value of plan assets | 45 | 38 |
Pension Plan | Non-US | Fixed income index- Long bond |  |  |
Plan assets |  |  |
Fair value of plan assets | 93 | 106 |
Pension Plan | Non-US | Other. |  |  |
Plan assets |  |  |
Fair value of plan assets | 21 | 26 |
Pension Plan | Non-US | Cash |  |  |
Plan assets |  |  |
Fair value of plan assets | 8 | 3 |
Pension Plan | Non-US | Level 1 |  |  |
Plan assets |  |  |
Fair value of plan assets | 8 | 3 |
Pension Plan | Non-US | Level 1 | Cash |  |  |
Plan assets |  |  |
Fair value of plan assets | 8 | 3 |
Pension Plan | Non-US | Level 2 |  |  |
Plan assets |  |  |
Fair value of plan assets | 236 | 246 |
Pension Plan | Non-US | Level 2 | Equity index - U.S. |  |  |
Plan assets |  |  |
Fair value of plan assets | 26 | 26 |
Pension Plan | Non-US | Level 2 | Equity index - International |  |  |
Plan assets |  |  |
Fair value of plan assets | 17 | 19 |
Pension Plan | Non-US | Level 2 | Fixed income index- Short bond |  |  |
Plan assets |  |  |
Fair value of plan assets | 34 | 31 |
Pension Plan | Non-US | Level 2 | Fixed income index - Intermediate bond |  |  |
Plan assets |  |  |
Fair value of plan assets | 45 | 38 |
Pension Plan | Non-US | Level 2 | Fixed income index- Long bond |  |  |
Plan assets |  |  |
Fair value of plan assets | 93 | 106 |
Pension Plan | Non-US | Level 2 | Other. |  |  |
Plan assets |  |  |
Fair value of plan assets | $ 21 | $ 26 |

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