Cash Flows (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Sep. 28, 2012	Sep. 30, 2011
Cash Flows [Abstract]
Interest Paid	$ 90	$ 90
Income Taxes Paid, Net	74	73
Capital Expenditures Incurred but Not yet Paid	28	68
Capital Lease Obligations Incurred	86	142
Assets acquired under long-term financing	0	49
Common share dividends declared, but not yet paid (non-cash)	$ 31	$ 31