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Restructuring and Other Charges - Additional Information (Detail) |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2017 Employees | Mar. 31, 2017 USD ($) Employees Positions | Mar. 31, 2016 USD ($) Positions | Dec. 31, 2016 Employees
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other charges |  | $ 73,000,000 | $ 16,000,000 |
Restructuring and other charges after tax and noncontrolling interest |  | $ 69,000,000 |  |
Number of employees associated with layoff costs | Positions |  | 328 |  |
Restructuring and other charges after tax |  |  | 11,000,000 |
Minimum amount of cash payments expected to be paid beyond the end of the current annual period |  | $ 1,000,000 |  |
Maximum amount of cash payments expected to be paid beyond the end of the current annual period |  | 5,000,000 |  |
Corporate [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other charges |  | $ 7,000,000 | 6,000,000 |
Number of employees associated with layoff costs | Positions |  | 42 |  |
Engineered Products and Solutions [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Number of employees associated with layoff costs | Positions |  | 114 |  |
Global Rolled Products [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Number of employees associated with layoff costs | Positions |  | 132 |  |
Transportation and Construction Solutions [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Number of employees associated with layoff costs | Positions |  | 40 |  |
Fusina Italy [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other charges |  | $ 60,000,000 |  |
Restructuring and other charges after tax and noncontrolling interest |  | 60,000,000 |  |
Restructuring Programs Layoffs 2015 [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other charges |  | 19,000,000 | $ 17,000,000 |
Restructuring and other charges after tax and noncontrolling interest |  | $ 13,000,000 |  |
Number of employees associated with layoff costs |  | 1,220 | 530 | 1,240
Restructuring and other charges after tax |  |  | $ 11,000,000 |
Approximate number of employees already laid off | Employees | 1,120 | 1,120 |  |
Cash payments made against the layoff reserves |  | $ 3,000,000 |  |
Restructuring Programs Layoffs 2015 [Member] | Engineered Products and Solutions [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Number of employees associated with layoff costs | Positions |  |  | 500 |
Restructuring Programs Layoffs 2015 [Member] | Global Rolled Products [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Number of employees associated with layoff costs | Positions |  |  | 30 |
Other Miscellaneous Items [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other charges |  | 5,000,000 |  |
Restructuring and other charges after tax and noncontrolling interest |  | 3,000,000 |  |
Other Adjustments [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other charges |  | 1,000,000 | $ 1,000,000 |
Restructuring and other charges after tax and noncontrolling interest |  | $ 1,000,000 | $ 0 |
Restructuring Programs Layoffs 2017 [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Number of employees associated with layoff costs | Employees | 328 |  |  |
Approximate number of employees already laid off | Employees | 5 | 5 |  |
Cash payments made against the layoff reserves |  | $ 1,000,000 |  |
Restructuring Programs Layoffs 2016 [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Number of employees associated with layoff costs | Employees | 1,800 |  |  |
Approximate number of employees already laid off | Employees | 1,075 | 1,075 |  |
Cash payments made against the layoff reserves |  | $ 14,000,000 |  |

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