Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Claims have been filed against the Company and certain of its affiliates in various jurisdictions across the United States by persons alleging bodily injury as a result of exposure to asbestos-containing products. Further information and detail on these claims are described in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018, in Note 21 therein, filed on February 27, 2019. During the first nine months of 2019, there were no material changes to the information described in the Form 10-K related to claims arising from asbestos exposure. From time to time, the Company is involved in litigation related to claims arising out of the Company's operations in the ordinary course of business, including claims based on product liability, contracts, intellectual property, or other causes of action. Further information and detail on any potentially material litigation is as described in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018, in Note 21 therein, filed on February 27, 2019. Except as described below, there have been no material changes to the information described in the Form 10-K related to claims arising from Company's ordinary operations. On April 21, 2016, Siemens Industry, Inc. filed a lawsuit against the Company in federal district court in Delaware alleging that the Company infringed seven patents owned by Siemens related to the Company's Positive Train Control (PTC) technology. On November 2, 2016, Siemens amended its complaint to add six additional patents they also claimed were infringed by the Company's PTC Products or End of Train (EOT) Products (Siemens Patent Case). The Company filed Answers, and asserted counterclaims, in response to Siemens’ complaints. Additionally, after filings by the Company, the US Patent & Trademark Office’s Patent Trail and Appeal Board (PTAB) granted Inter-Parties Review (IPR) proceedings on eight (8) of the patents asserted by Siemens to contest their validity. Following pre-trial rulings that greatly reduced Siemens’ alleged damages, a jury trial was held in federal district court in Delaware in January 2019 on eight patents, two of which were still subject to an IPR decision on validity from the PTAB. At the conclusion of the trial, the jury awarded Siemens damages of $5.6 million related to PTC patents and $1.1 million related to EOT patents. On August 15, 2019, the Court entered a final judgement in the amount of $14.1 million in favor of Siemens, which included post-discovery damages on all Wabtec PTC and EOT sales through July 2019. Both parties appealed the Final Judgement. On September 27, 2019, the parties entered into a global settlement agreement, settling all on-going litigation between them, as part of the patent litigation including antitrust claims Siemens had made against Wabtec initially. Xorail, Inc., a wholly owned subsidiary of the Company (“Xorail”), has received notices from Denver Transit Constructors (“DTC”) alleging breach of contract related to the operating of constant warning wireless crossings, and late delivery of the Train Management & Dispatch System (“TMDS”) for the Denver Eagle P3 Project, which is owned by the Denver Regional Transit District ("RTD"). No damages have been asserted for the alleged late delivery of the TMDS, and no formal claim has been filed. Xorail is in the final stages of successfully implementing a recovery plan concerning the TMDS issues. With regard to the wireless crossing issue, as of September 8, 2017, DTC alleged that total damages were $36.8 million through July 31, 2017 and are continuing to accumulate. The majority of the damages stems from a delay in approval of the wireless crossing system by the Federal Railway Administration ("FRA") and the Public Utility Commission ("PUC"), resulting in the use of flaggers at all of the crossings pending approval of the wireless crossing system and certification of the crossings. DTC has alleged that the delay is due to Xorail's failure to achieve constant warning times for the crossings in accordance with the approval requirements imposed by the FRA and PUC. Xorail has denied DTC's assertions, stating that its system satisfied the contractual requirements. Xorail has worked with DTC to modify its system and implement the FRA's and PUC's previously undefined approval requirements; the FRA and PUC have both approved modified wireless crossing system, and as of August 2018, DTC completed the process of certifying the crossings and eliminated the use of flaggers. On September 21, 2018, DTC filed a complaint against RTD in Colorado state court for breach of contract related to non-payments and the costs for the flaggers, asserting a change-in-law arising from the FRA/PUC’s new certification requirements; a jury trial is scheduled to begin in May 2020. DTC’s complaint generally supports Xorail’s position and does not name or implicate Xorail; DTC has not updated its notices against Xorail, nor have they filed any formal claim against Xorail. On April 3, 2018, the Company and Knorr-Bremse AG entered into a consent decree with the United States Department of Justice resolving allegations that the Company and Knorr-Bremse AG had maintained unlawful agreements not to compete for each other’s employees. The allegations also related to Faiveley Transport before it was acquired by the Company in November 2016. No monetary fines or penalties were imposed on the Company. The Company elected to settle this matter with the Department of Justice to avoid the cost and distraction of litigation. Putative class action lawsuits thereafter were filed in several different federal district courts naming the Company and Knorr as defendants in connection with the allegations contained in the consent decree. The lawsuits seek unspecified damages on behalf of employees of the Company (including Faiveley Transport) and Knorr allegedly caused by the defendants’ actions. A federal Multi-District Litigation (MDL) Panel consolidated the cases in the Western District of Pennsylvania, and on October 12, 2018, a consolidated class action complaint was filed in the Western District of PA with five named plaintiffs, three of whom were Company employees. The litigation is in its early stages and the Company does not believe that it has diminished competition for talent in the marketplace and intends to contest these claims vigorously. The Company’s motion to dismiss the entire claim was denied on June 20, 2019, but the Court granted the Company’s motions to dismiss the plaintiffs’ conspiracy allegations and strike the plaintiffs’ class definition. In July 2019, Plaintiffs filed an amended class definition, targeting employees with ‘valuable’ railroad industry experience or skills’, and the Company has filed a new motion to strike that categorization. On August 13, 2019, the Company was notified that co-defendant Knorr-Bremse settled with plaintiffs for an unknown amount. A Court-sponsored early mediation is expected to occur before the end of 2019.