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Acquisitions - General Electric Transportation (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Feb. 25, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | May 06, 2019 | May 05, 2019 | Apr. 30, 2019 | Feb. 22, 2019
Business Acquisition [Line Items] |  |  |  |  |  |  |
Common stock, shares outstanding (in shares) |  | 162,817,600 | 96,614,946 |  |  |  |
Preferred stock, shares outstanding (in shares) |  | 0 | 0 |  |  |  |
Common stock, shares issued (in shares) |  | 198,131,716 |  |  |  |  |
Preferred stock, shares issued (in shares) |  | 10,000 | 0 |  |  |  |
GE Transportation |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Consideration transferred | $ 2,875,000 |  |  |  |  |  |
Payments to Acquire Businesses, Gross | 470,000 |  |  |  |  |  |
Business combination, consideration transferred | 10,300,000 |  |  |  |  |  |
Closing share price (in USD per share) |  |  |  |  |  |  | $ 73.36
Revenues |  | $ 495,000 |  |  |  |  |
Operating income |  | 500 |  |  |  |  |
Acquisition related costs |  | $ 58,900 |  |  |  |  |
GE Transportation | SpinCo Class B Preferred Stock |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Business combination, consideration transferred | $ 10,000 |  |  |  |  |  |
GE Transportation | Convertible Preferred Stock |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Shares issuable (in shares) | 10,000 |  |  |  |  |  |
GE Transportation | GE and Pre-Merger Holders |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Percentage of outstanding shares transferred |  |  | 49.20% |  |  |  |
GE Transportation | General Electric Company |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Percentage of outstanding shares transferred | 9.90% |  | 9.90% |  |  |  |
GE Transportation | General Electric Company | Convertible Preferred Stock |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Percentage of outstanding shares transferred |  |  | 15.00% |  |  |  |
General Electric Company |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Noncontrolling interest acquired | $ 86,765 |  |  |  |  |  |
Wabtec | GE Transportation | SpinCo Class B Preferred Stock |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Preferred stock, shares outstanding (in shares) |  |  | 10,000 |  |  |  |
Pre-merger Wabtec Stockholders | GE Transportation |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Percentage of outstanding shares transferred |  |  | 50.80% |  |  |  |
General Electric Company |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Business combination, consideration transferred |  |  | $ 2,885,000 |  |  |  |
Common stock, shares issued (in shares) |  |  | 19,018,207 |  |  |  |
Preferred stock, shares issued (in shares) |  |  | 10,000 |  |  |  |
General Electric Company | General Electric Company |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Common stock, shares issued (in shares) |  |  | 46,763,975 |  |  |  |
General Electric Company | GE Transportation | SpinCo Common Stock |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Common stock, shares outstanding (in shares) | 8,700,000,000 |  |  |  |  |  |
General Electric Company | GE Transportation | SpinCo Class A Preferred Stock |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Preferred stock, shares outstanding (in shares) | 15,000 |  | 15,000 |  |  |  |
General Electric Company | GE Transportation | SpinCo Class B Preferred Stock |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Preferred stock, shares outstanding (in shares) | 10,000 |  |  |  |  |  |
Minimum | General Electric Company | GE Transportation |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Percentage of common shares outstanding |  |  | 14.90% |  |  |  |
Maximum | Pre-merger Wabtec Stockholders | GE Transportation |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Percentage of common shares outstanding |  |  | 18.50% |  |  |  |
Maximum | General Electric Company | GE Transportation |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Percentage of common shares outstanding |  |  | 19.90% |  |  |  |
Subsequent Event | Series A Preferred Stock |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Preferred stock, shares outstanding (in shares) |  |  |  | 1,220 |  |  |
Subsequent Event | Common Stock |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Preferred stock, shares outstanding (in shares) |  |  |  | 3,515,500 |  |  |
Subsequent Event | General Electric Company |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Percentage of outstanding shares transferred |  |  |  | 11.70% | 24.90% |  |
Subsequent Event | GET Brazil |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Noncontrolling interest acquired |  |  |  |  |  | $ 56,200 |
Subsequent Event | General Electric Company | GE Transportation | Series A Preferred Stock |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Preferred stock, shares outstanding (in shares) |  |  |  | 8,780 |  |  |
Subsequent Event | General Electric Company | GE Transportation | Common Stock |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Preferred stock, shares outstanding (in shares) |  |  |  | 25,300,000 |  |  |
Subsequent Event | Minimum | General Electric Company | General Electric Company |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Percentage of outstanding shares transferred |  |  |  | 14.90% |  |  |

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