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Acquisitions - Summary of Preliminary Estimated Fair Values of GET Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Feb. 25, 2019	Dec. 31, 2018
Assets acquired
Goodwill	$ 8,142,473		$ 2,396,544
General Electric Company
Assets acquired
Cash and cash equivalents		$ 174,334
Accounts receivable		530,054
Inventories		1,179,439
Other current assets		64,464
Property, plant & equipment		1,071,402
Goodwill		5,783,358
Other noncurrent assets		234,823
Total assets acquired		12,317,826
Liabilities assumed
Current liabilities		1,495,438
Contingent consideration		440,000
Other noncurrent liabilities		523,801
Total liabilities assumed		2,459,239
Net assets acquired		9,858,587
Net assets acquired		86,765
General Electric Company | Trade Names
Assets acquired
Intangible assets acquired		50,000
General Electric Company | Customer relationships
Assets acquired
Intangible assets acquired		529,984
General Electric Company | Patents
Assets acquired
Intangible assets acquired		1,219,968
General Electric Company | Backlog
Assets acquired
Intangible assets acquired		$ 1,480,000

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