Restructuring, Separation, Transition and Other Costs (Schedule of the Restructuring, Separation and Transition Expense Summary) (Details)	3 Months Ended	6 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring costs		$ 99,000,000
Total restructuring, separation, transition, and other	$ 65,000,000	144,000,000
Continuing Operations
Restructuring Cost and Reserve [Line Items]
Transition and other related costs	25,000,000	45,000,000
Total restructuring, separation, transition, and other	64,000,000	134,000,000
Discontinued Operations
Restructuring Cost and Reserve [Line Items]
Total restructuring, separation, transition, and other	1,000,000	10,000,000
Fiscal 2017 Plan
Restructuring Cost and Reserve [Line Items]
Expected noncash expenses	50,000,000	50,000,000
Restructuring costs		87,000,000
Fiscal 2017 Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Restructuring costs	39,000,000	87,000,000
Fiscal 2017 Plan | Severance and termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring costs		38,000,000
Fiscal 2017 Plan | Severance and termination benefits | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Restructuring costs	14,000,000	38,000,000
Fiscal 2017 Plan | Other exit and disposal costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs		35,000,000
Fiscal 2017 Plan | Other exit and disposal costs | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Restructuring costs	20,000,000	35,000,000
Fiscal 2017 Plan | Asset write-offs
Restructuring Cost and Reserve [Line Items]
Restructuring costs		14,000,000
Fiscal 2017 Plan | Asset write-offs | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Restructuring costs	5,000,000	14,000,000
Fiscal 2015 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs		12,000,000
Fiscal 2015 Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Restructuring costs	0	2,000,000
Minimum | Fiscal 2017 Plan
Restructuring Cost and Reserve [Line Items]
Expected cost	230,000,000	230,000,000
Minimum | Fiscal 2017 Plan | Severance and termination benefits
Restructuring Cost and Reserve [Line Items]
Expected cost	90,000,000	90,000,000
Minimum | Fiscal 2017 Plan | Contract termination and relocation costs
Restructuring Cost and Reserve [Line Items]
Expected cost	45,000,000	45,000,000
Maximum | Fiscal 2017 Plan
Restructuring Cost and Reserve [Line Items]
Expected cost	280,000,000	280,000,000
Maximum | Fiscal 2017 Plan | Severance and termination benefits
Restructuring Cost and Reserve [Line Items]
Expected cost	100,000,000	100,000,000
Maximum | Fiscal 2017 Plan | Contract termination and relocation costs
Restructuring Cost and Reserve [Line Items]
Expected cost	$ 60,000,000	$ 60,000,000