Acquisitions - Identified Intangible Assets Acquired (Details) - HPES $ in Millions	Apr. 01, 2017 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 5,085
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 3,950
Estimated Useful Lives (Years)	13 years
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 440
Estimated Useful Lives (Years)	7 years
Third-party purchased software
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 499
Third-party purchased software | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives (Years)	4 years
Third-party purchased software | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives (Years)	7 years
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 110
Estimated Useful Lives (Years)	4 years
Other intangibles
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 86
Estimated Useful Lives (Years)	7 years