Restructuring 2 (Details) $ in Millions	May 02, 2018 USD ($) Employee	Sep. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)
Restructuring
Facility exit accruals		$ 70	$ 7
Employee Severance
Restructuring
Facility exit accruals		32	0
Facility Exit and Consolidation
Restructuring
Facility exit accruals		38	$ 7
Fiscal 2019 Plan
Restructuring
Expected number of positions eliminated | Employee	800
Fiscal 2019 Plan | Minimum
Restructuring
Expected restructuring costs	$ 140
Fiscal 2019 Plan | Minimum | Employee Severance
Restructuring
Expected restructuring costs	90
Fiscal 2019 Plan | Minimum | Facility Exit and Consolidation
Restructuring
Expected restructuring costs	50
Fiscal 2019 Plan | Maximum
Restructuring
Expected restructuring costs	160
Fiscal 2019 Plan | Maximum | Employee Severance
Restructuring
Expected restructuring costs	100
Fiscal 2019 Plan | Maximum | Facility Exit and Consolidation
Restructuring
Expected restructuring costs	$ 60
Plans and Actions Prior to Fiscal 2019 Plan | Facility Exit and Consolidation
Restructuring
Facility exit accruals		$ 7