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GUARANTOR SUBSIDIARIES FINANCIAL INFORMATION - Balance Sheet (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | ---
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Cash, cash equivalents, and restricted cash | $ 2,342,354 | $ 233,401 | $ 1,143,232 | $ 429,133
Receivables, net | 1,146,778 | 1,166,787 |  |
Inventories | 844,886 | 742,634 |  |
Current assets - other | 115,649 | 122,291 |  |
Total current assets | 4,449,667 | 2,265,113 |  |
Property, plant and equipment | 563,737 | 573,972 | 518,376 |
Goodwill | 2,396,544 | 2,460,103 |  |
Investment in subsidiaries | 0 | 0 |  |
Other intangibles, net | 1,129,880 | 1,204,432 |  |
Other noncurrent assets | 109,406 | 76,360 |  |
Total Assets | 8,649,234 | 6,579,980 | 6,581,018 |
Current liabilities | 1,646,690 | 1,573,330 |  |
Inter-company | 0 | 0 |  |
Long-term debt | 3,792,774 | 1,823,303 |  |
Long-term liabilities - other | 340,695 | 354,815 |  |
Total liabilities | 5,780,159 | 3,751,448 |  |
Total Westinghouse Air Brake Technologies Corporation shareholders' equity | 2,865,131 | 2,808,868 |  |
Noncontrolling interest | 3,944 | 19,664 |  |
Total equity | 2,869,075 | 2,828,532 | 2,976,825 | 1,701,339
Total Liabilities and Equity | 8,649,234 | 6,579,980 |  |
Elimination |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Cash, cash equivalents, and restricted cash | 0 | 0 | 0 | 0
Receivables, net | 0 | 0 |  |
Inventories | 0 | 0 |  |
Current assets - other | 0 | 0 |  |
Total current assets | 0 | 0 |  |
Property, plant and equipment | 0 | 0 |  |
Goodwill | 0 | 0 |  |
Investment in subsidiaries | (10,730,086) | (8,957,870) |  |
Other intangibles, net | 0 | 0 |  |
Other noncurrent assets | 0 | 0 |  |
Total Assets | (10,730,086) | (8,957,870) |  |
Current liabilities | 0 | 0 |  |
Inter-company | 0 | 0 |  |
Long-term debt | 0 | 0 |  |
Long-term liabilities - other | 0 | 0 |  |
Total liabilities | 0 | 0 |  |
Total Westinghouse Air Brake Technologies Corporation shareholders' equity | (10,730,086) | (8,957,870) |  |
Noncontrolling interest | 0 | 0 |  |
Total equity | (10,730,086) | (8,957,870) |  |
Total Liabilities and Equity | (10,730,086) | (8,957,870) |  |
Parent | Reportable Legal Entities |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Cash, cash equivalents, and restricted cash | 1,782,682 | 933 | 2,522 | 0
Receivables, net | 106,815 | 77,046 |  |
Inventories | 149,622 | 120,937 |  |
Current assets - other | 11,884 | 1,142 |  |
Total current assets | 2,051,003 | 200,058 |  |
Property, plant and equipment | 51,551 | 52,532 |  |
Goodwill | 25,275 | 25,274 |  |
Investment in subsidiaries | 6,707,979 | 6,517,205 |  |
Other intangibles, net | 29,254 | 30,575 |  |
Other noncurrent assets | 8,775 | 17,414 |  |
Total Assets | 8,873,837 | 6,843,058 |  |
Current liabilities | 264,630 | 196,827 |  |
Inter-company | 1,947,504 | 2,121,546 |  |
Long-term debt | 3,779,627 | 1,661,771 |  |
Long-term liabilities - other | 16,945 | 54,046 |  |
Total liabilities | 6,008,706 | 4,034,190 |  |
Total Westinghouse Air Brake Technologies Corporation shareholders' equity | 2,865,131 | 2,808,868 |  |
Noncontrolling interest | 0 | 0 |  |
Total equity | 2,865,131 | 2,808,868 |  |
Total Liabilities and Equity | 8,873,837 | 6,843,058 |  |
Guarantors | Reportable Legal Entities |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Cash, cash equivalents, and restricted cash | (119) | 625 | 1,226 | 8,626
Receivables, net | 61,513 | 59,166 |  |
Inventories | 69,116 | 46,626 |  |
Current assets - other | 690 | 563 |  |
Total current assets | 131,200 | 106,980 |  |
Property, plant and equipment | 24,755 | 26,492 |  |
Goodwill | 283,241 | 283,242 |  |
Investment in subsidiaries | 4,022,107 | 2,440,665 |  |
Other intangibles, net | 78,547 | 81,037 |  |
Other noncurrent assets | 149 | (23,892) |  |
Total Assets | 4,539,999 | 2,914,524 |  |
Current liabilities | 91,004 | 77,284 |  |
Inter-company | (1,436,222) | (1,307,410) |  |
Long-term debt | 0 | 14 |  |
Long-term liabilities - other | 48,714 | 20,594 |  |
Total liabilities | (1,296,504) | (1,209,518) |  |
Total Westinghouse Air Brake Technologies Corporation shareholders' equity | 5,836,503 | 4,124,042 |  |
Noncontrolling interest | 0 | 0 |  |
Total equity | 5,836,503 | 4,124,042 |  |
Total Liabilities and Equity | 4,539,999 | 2,914,524 |  |
Non-Guarantors | Reportable Legal Entities |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Cash, cash equivalents, and restricted cash | 559,791 | 231,843 | $ 1,139,484 | $ 420,507
Receivables, net | 978,450 | 1,030,575 |  |
Inventories | 626,148 | 575,071 |  |
Current assets - other | 103,075 | 120,586 |  |
Total current assets | 2,267,464 | 1,958,075 |  |
Property, plant and equipment | 487,431 | 494,948 |  |
Goodwill | 2,088,028 | 2,151,587 |  |
Investment in subsidiaries | 0 | 0 |  |
Other intangibles, net | 1,022,079 | 1,092,820 |  |
Other noncurrent assets | 100,482 | 82,838 |  |
Total Assets | 5,965,484 | 5,780,268 |  |
Current liabilities | 1,291,056 | 1,299,219 |  |
Inter-company | (511,282) | (814,136) |  |
Long-term debt | 13,147 | 161,518 |  |
Long-term liabilities - other | 275,036 | 280,175 |  |
Total liabilities | 1,067,957 | 926,776 |  |
Total Westinghouse Air Brake Technologies Corporation shareholders' equity | 4,893,583 | 4,833,828 |  |
Noncontrolling interest | 3,944 | 19,664 |  |
Total equity | 4,897,527 | 4,853,492 |  |
Total Liabilities and Equity | $ 5,965,484 | $ 5,780,268 |  |

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