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Restructuring and Other Charges - Activity and Reserve Balances for Restructuring Charges (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring reserve beginning balance |  |  | $ 54 |
Cash payments |  |  | (32) |
Restructuring charges | $ 5 | $ 105 | 14 | $ 144
Other |  |  | (15) |
Restructuring reserve ending balance | 21 |  | 21 |
Settlements | 3 | 64 | 6 | 64
Restructuring and other charges | 5 | 105 | 14 | 144
Gain (loss) on sale of assets |  |  | 3 |
Small Manufacturing Business |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring charges |  |  | 6 |
Restructuring and other charges |  |  | 6 |
Pension benefits |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Settlements | 3 | $ 64 | 6 | $ 64
Layoff costs |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring reserve beginning balance |  |  | 54 |
Cash payments |  |  | (32) |
Restructuring charges |  |  | 7 |
Other |  |  | (8) |
Restructuring reserve ending balance | 21 |  | 21 |
Restructuring and other charges |  |  | 7 |
Other exit costs |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring reserve beginning balance |  |  | 0 |
Cash payments |  |  | 0 |
Restructuring charges |  |  | 7 |
Other |  |  | (7) |
Restructuring reserve ending balance | $ 0 |  | 0 |
Restructuring and other charges |  |  | 7 |
Other Layoffs Costs |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring charges |  |  | 2 |
Restructuring and other charges |  |  | 2 |
Facility closing | Small Manufacturing Business |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring charges |  |  | 4 |
Restructuring and other charges |  |  | $ 4 |

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