Acquisitions and Divestitures Tritium (Details) - Tritium $ in Millions	Sep. 11, 2018 USD ($) country
Equity Securities without Readily Determinable Fair Value [Line Items]
Payment to acquire investment \| $	$ 50.0
Number of countries with installations \| country	26

Amount of cash outflow to acquire investments classified as other.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration