Pension Benefits (Schedule Of Changes In Benefit Obligations And Plan Assets) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Mar. 31, 2012
United States [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at beginning of period	$ 580	[1]	$ 527	[1]
Service cost	4		4		4
Interest cost	19		21		24
Actuarial (gain) loss	(24)		58
Benefit payments	(30)		(29)
Amendments	(9)		0
Acquisitions	0		0
Foreign exchange impact and other	0		(1)
Benefit obligation at end of period (1)	540	[1]	580	[1]	527	[1]
Fair value of plan assets at beginning of period	290		284
Actual return on plan assets	28		(19)
Employer and participant contributions	12		17
Defined Benefit Plan, Benefits Paid, Net of Contribution	30		29
Acquisitions	0		0
Foreign exchange impact and other	0		(1)
Fair value of plan assets at end of period	300		290		284
Funded status at end of period	(240)		(290)
Current liabilities	(13)		(3)
Long-term liabilities	(227)		(287)
Total	(240)		(290)
Foreign Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at beginning of period	156	[1]	143	[1]
Service cost	6		3		3
Interest cost	11		7		7
Actuarial (gain) loss	15		15
Benefit payments	(12)		(6)
Amendments	0		0
Acquisitions	740		0
Foreign exchange impact and other	18		(6)
Benefit obligation at end of period (1)	934	[1]	156	[1]	143	[1]
Fair value of plan assets at beginning of period	135		126
Actual return on plan assets	(11)		(12)
Employer and participant contributions	12		8
Defined Benefit Plan, Benefits Paid, Net of Contribution	10		6
Acquisitions	426		0
Foreign exchange impact and other	16		(5)
Fair value of plan assets at end of period	590		135		126
Funded status at end of period	(344)		(21)
Current liabilities	(9)		0
Long-term liabilities	(335)		(21)
Total	$ (344)		$ (21)

[1] The benefit obligation is the projected benefit obligation.