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Commitments and Contingencies - Legal, Tax, and Other Matters (Details) $ in Millions, ₩ in Billions | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Nov. 30, 2016 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2016 KRW (₩)
Assessment |  |  |
Loss Contingencies [Line Items] |  |  |
Estimate of possible loss |  | $ 10.4 | ₩ 11.9
Pre-assessment |  |  |
Loss Contingencies [Line Items] |  |  |
Estimate of possible loss |  | 17.6 | ₩ 20.1
Collectibility of receivables | Hanjin |  |  |
Loss Contingencies [Line Items] |  |  |
Write off of customer receivables |  | 5.8 |
Loss contingency, outstanding receivables |  | 7.0 |
AGCS | Insurance Claims |  |  |
Loss Contingencies [Line Items] |  |  |
Estimate of possible loss |  | $ 18.0 |
AGCS | Judicial Ruling |  |  |
Loss Contingencies [Line Items] |  |  |
Damages and interest awarded | $ 24.5 |  |

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