Investigations and Out of Period Adjustments (Other Adjustments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Dec. 30, 2011	Dec. 28, 2012	Dec. 30, 2011
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Cumulative effect on income (loss) from continuing opertaions, pre tax	$ 51	$ (18)	$ 74
Cumulative Quantifying Misstatement Effect of Correction Tax	(12)		(2)
Cumulative effect of correction on net income (loss), net of tax	39		72
Nordic Operations [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Cumulative effect on income (loss) from continuing opertaions, pre tax	2		12
Australia Operations [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Cumulative effect on income (loss) from continuing opertaions, pre tax	2		22
NHS contract [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Cumulative effect on income (loss) from continuing opertaions, pre tax	47		43
Other Operations [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Cumulative effect on income (loss) from continuing opertaions, pre tax	$ 0		$ (3)