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Postretirement Benefit Plans - Weighted Average Allocations (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015
U.S. defined benefit plan | Fixed income securities and cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Targeted allocation (in percent) | 65.00% |
Actual plan asset allocation (in percent) | 66.00% | 65.00%
U.S. defined benefit plan | Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Targeted allocation (in percent) | 35.00% |
Actual plan asset allocation (in percent) | 34.00% | 35.00%
U.S. retiree health care plan | Fixed income securities and cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Targeted allocation range minimum (in percent) | 50.00% |
Targeted allocation range maximum (in percent) | 65.00% |
Actual plan asset allocation (in percent) | 52.00% | 50.00%
U.S. retiree health care plan | Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Targeted allocation range minimum (in percent) | 35.00% |
Targeted allocation range maximum (in percent) | 50.00% |
Actual plan asset allocation (in percent) | 48.00% | 50.00%
Non-U.S. defined benefit plan | Fixed income securities and cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Targeted allocation range minimum (in percent) | 60.00% |
Targeted allocation range maximum (in percent) | 100.00% |
Actual plan asset allocation (in percent) | 72.00% | 70.00%
Non-U.S. defined benefit plan | Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Targeted allocation range minimum (in percent) | 0.00% |
Targeted allocation range maximum (in percent) | 40.00% |
Actual plan asset allocation (in percent) | 28.00% | 30.00%

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