Acquisitions - Property and Equipment (Details) - HPES $ in Millions	Apr. 01, 2017 USD ($)
Business Acquisition [Line Items]
Property and equipment	$ 2,918
Land, buildings, and leasehold improvements
Business Acquisition [Line Items]
Property and equipment	1,617
Computers and related equipment
Business Acquisition [Line Items]
Property and equipment	1,123
Furniture and other equipment
Business Acquisition [Line Items]
Property and equipment	45
Construction in progress
Business Acquisition [Line Items]
Property and equipment	$ 133

The amount of property, plant, and equipment recognized as of the acquisition date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 55
-Paragraph 37
-URI http://asc.fasb.org/extlink&oid=84160947&loc=d3e2207-128464

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant