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Restructuring - Additional Information (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2020 USD ($) Employee | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Charges | $ 118 | $ 80 | $ 22
Charges related to voluntary termination program, Number of Positions Eliminated | Employee | 400 |  |
T19 Restructuring [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Charges | $ 14 | 55 |
Payments for Restructuring | (20) | (51) |
Brazil Restructuring [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Charges | $ 0 | 7 |
Restructuring and Related Cost, Number of Positions Eliminated | Employee | 22 |  |
Payments for Restructuring | $ (1) | $ (6) |
Restructuring and Related Cost, Expected Cost Remaining | 2 |  |
2020 Optimization |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Charges | $ 79 |  |
Restructuring and Related Cost, Expected Number of Positions Eliminated | Employee | 4,300 |  |
Payments for Restructuring | $ (71) |  |

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