Acquisitions Purchase Price (Details) - USD ($) $ in Millions	5 Months Ended	6 Months Ended
Dec. 31, 2018	Jun. 30, 2018
Other [Member]
Purchase Price
Total Purchase Price		$ 65
Scenario, Forecast [Member] \| Gatan, Inc. [Member]
Purchase Price
Cash paid	$ 925

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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