Commitments and Contingencies	9 Months Ended
Sep. 30, 2018
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 is described in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017, in Note 19 therein, filed on February 26, 2018. During the first nine months of 2018, there were no material changes to the information described in the Form 10-K. 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, 2017, in Note 19 therein, filed on February 26, 2018. Except as described below, there have been no material changes to the information described in the Form 10-K. On April 21, 2016, Siemens Industry, Inc. filed a lawsuit against the Company in federal district court in Delaware alleging that the Company has infringed seven patents owned by Siemens, all of which relate to Positive Train Control technology. On November 2, 2016, Siemens amended its complaint to add six additional patents they also claim are infringed by the Company’s Positive Train Control Products. The Company has filed Answers, and asserted counterclaims, in response to Siemens’ complaints. Additionally, after filings by the Company, the US Patent & Trademark Office has granted Inter-Parties Review proceedings on ten (10) of the patents asserted by Siemens to contest their validity; the hearings began in April 2018 and will continue through November 2018. As of October 24, 2018, the USPTO has issued a decision in only one of the IPR hearings, finding the Siemens patent claims at issue in that hearing to be invalid. Despite the pendency of the remaining IPR proceedings, a trial is scheduled for January 19, 2019 on Siemens’ infringement claims. Wabtec’s counterclaims alleging that Siemens has violated three (3) of Wabtec’s patents have been severed from the initial case and are now a separate case pending in federal district court in Delaware. On August 1, 2018, Wabtec’s motion for a preliminary injunction against Siemens was denied after a hearing. On July 19, 2018, Siemens moved to amend its pleadings in this case to add new counterclaims alleging violations of federal antitrust and state trade practices laws; Siemens’ motion to amend was granted on October 3, 2018. Wabtec will file responsive pleadings and/or motions. Xorail, Inc., a wholly owned subsidiary of the Company (“Xorail”), has received notices from Denver Transit Constructors (“Denver Transit”) 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, Denver Transit 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. Denver Transit 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 Denver Transit's assertions, asserting that its system satisfied the contractual requirements. No formal claim has been filed against Xorail by Denver Transit. Xorail has worked with Denver Transit to modify its system to meet the FRA's and PUC's previously undefined approval requirements. On September 28, 2017, the FRA granted a five year approval of the modified wireless crossing system as currently implemented. On March 28, 2018, the PUC granted its approval of the modified wireless crossing system as currently implemented, consistent with the approval previously granted by the FRA. In August 2018, Denver Transit completed the process of certifying the crossings and eliminating 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. The complaint generally supports Xorail’s position and does not name or implicate Xorail. On April 3, 2018, the United States Department of Justice entered into a proposed consent decree 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. The proposed consent decree is pending review and approval by the U.S. District Court for the District of Columbia. No monetary fines or penalties have been imposed on the Company. The Company elected to settle this matter with the Department of Justice to avoid the cost and distraction of litigation. As of July 16, 2018, putative class action lawsuits have been filed in several different federal district courts naming the Company and Knorr as defendants in connection with the allegations contained in the proposed 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 decided that cases will be consolidated and heard in the Western District of Pennsylvania. As of October 15, 2018, a total of at least 30 plaintiffs have filed class action claims relating to the alleged conspiracy. The litigation is in its very 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.

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 is described in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017, in Note 19 therein, filed on February 26, 2018. During the first nine months of 2018, there were no material changes to the information described in the Form 10-K.

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, 2017, in Note 19 therein, filed on February 26, 2018. Except as described below, there have been no material changes to the information described in the Form 10-K.

On April 21, 2016, Siemens Industry, Inc. filed a lawsuit against the Company in federal district court in Delaware alleging that the Company has infringed seven patents owned by Siemens, all of which relate to Positive Train Control technology. On November 2, 2016, Siemens amended its complaint to add six additional patents they also claim are infringed by the Company’s Positive Train Control Products. The Company has filed Answers, and asserted counterclaims, in response to Siemens’ complaints. Additionally, after filings by the Company, the US Patent & Trademark Office has granted Inter-Parties Review proceedings on ten (10) of the patents asserted by Siemens to contest their validity; the hearings began in April 2018 and will continue through November 2018. As of October 24, 2018, the USPTO has issued a decision in only one of the IPR hearings, finding the Siemens patent claims at issue in that hearing to be invalid. Despite the pendency of the remaining IPR proceedings, a trial is scheduled for January 19, 2019 on Siemens’ infringement claims.

Wabtec’s counterclaims alleging that Siemens has violated three (3) of Wabtec’s patents have been severed from the initial case and are now a separate case pending in federal district court in Delaware. On August 1, 2018, Wabtec’s motion for a preliminary injunction against Siemens was denied after a hearing. On July 19, 2018, Siemens moved to amend its pleadings in this case to add new counterclaims alleging violations of federal antitrust and state trade practices laws; Siemens’ motion to amend was granted on October 3, 2018. Wabtec will file responsive pleadings and/or motions.

Xorail, Inc., a wholly owned subsidiary of the Company (“Xorail”), has received notices from Denver Transit Constructors (“Denver Transit”) 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, Denver Transit 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. Denver Transit 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 Denver Transit's assertions, asserting that its system satisfied the contractual requirements. No formal claim has been filed against Xorail by Denver Transit. Xorail has worked with Denver Transit to modify its system to meet the FRA's and PUC's previously undefined approval requirements. On September 28, 2017, the FRA granted a five year approval of the modified wireless crossing system as currently implemented. On March 28, 2018, the PUC granted its approval of the modified wireless crossing system as currently implemented, consistent with the approval previously granted by the FRA. In August 2018, Denver Transit completed the process of certifying the crossings and eliminating 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. The complaint generally supports Xorail’s position and does not name or implicate Xorail.

On April 3, 2018, the United States Department of Justice entered into a proposed consent decree 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. The proposed consent decree is pending review and approval by the U.S. District Court for the District of Columbia. No monetary fines or penalties have been imposed on the Company. The Company elected to settle this matter with the Department of Justice to avoid the cost and distraction of litigation. As of July 16, 2018, putative class action lawsuits have been filed in several different federal district courts naming the Company and Knorr as defendants in connection with the allegations contained in the proposed 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 decided that cases will be consolidated and heard in the Western District of Pennsylvania. As of October 15, 2018, a total of at least 30 plaintiffs have filed class action claims relating to the alleged conspiracy. The litigation is in its very 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.