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Commitments and Contingencies - Other Loss Contingencies (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 12, 2014 | Apr. 30, 2013 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Loss Contingencies [Line Items] |  |  |  |  |
Long-term indemnification assets |  |  | $ 82,061 | $ 98,493 |
UAM Brazil |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Noncontrolling interest, noncontrolling owners, ownership percent |  | 49.00% |  |  |
Brazil |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Estimate of possible contingency loss |  |  | 45,000 |  |
Discontinued Operations, Held-for-sale |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Long-term indemnification assets |  |  | 476 | 935 |
Discontinued Operations, Held-for-sale | Brazil |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Sales-type and Direct Financing Leases, Lease Receivable |  |  | 19,000 |  |
Repayment Guarantee for Loans that Financed a Portion of the Purchase Price |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Percentage of shares as guarantee of payment obligations | 75.00% |  |  |  |
Repayment Guarantee for Obligations Under the Purchase Agreement for the Seller Notes |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Percentage of shares as guarantee of payment obligations | 25.00% |  |  |  |
Pending Litigation |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Contingent liabilities recorded |  |  | 29,000 | 18,000 |
Pending Litigation | Discontinued Operations, Held-for-sale |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Contingent liabilities recorded |  |  | $ 18,000 | 4,000 |
Taxes, Other-Than-Income Tax |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Loss contingency, statues of limitations |  |  | 10 years |  |
Taxes, Other-Than-Income Tax And Indemnification Assets |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Increases/(decreases) to operating income for adjustments to non-income tax contingencies and indemnification assets |  |  | $ (6,884) | 2,586 | $ (18,963)
Income Tax Contingencies |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Contingent liabilities recorded |  |  | 64,157 | 103,189 |
Income Tax Contingencies | Discontinued Operations, Held-for-sale |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Contingent liabilities recorded |  |  | 11,208 | 9,300 |
Guarantee of Indebtedness of Others | Chile |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Loss contingency, noncurrent |  |  | 28,254 | 27,073 |
Guarantee amount, maximum potential amount of payments |  |  | 499,000 | 527,000 |
Guarantee Obligations |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Percent of shares of company acquired in a business combination, used as a guarantee |  | 49.00% |  |  |
Other Noncurrent Liabilities | Taxes, Other-Than-Income Tax |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Loss contingency, noncurrent |  |  | 52,880 | 77,258 |
Other Noncurrent Liabilities | Taxes, Other-Than-Income Tax | Discontinued Operations, Held-for-sale |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Loss contingency, noncurrent |  |  | $ 4,999 | $ 7,240 |

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