Investigations and Out of Period Adjustments (Rollover impact on Income (loss) from continuing operations, before taxes and Impact on Foreign Adjustments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 30, 2011	Mar. 29, 2013	Mar. 30, 2012
NHS contract [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment	$ 24
NHS contract [Member] | Fiscal 2013 Adjustments
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment		(9)
NHS contract [Member] | Fiscal 2012 Adjustments
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment	24	10	25
NHS contract [Member] | Fiscal 2011 Adjustments
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment		(15)	(7)
NHS contract [Member] | Fiscal 2010 Adjustments
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment		18	(4)
NHS contract [Member] | Adjustments relating to fiscal years prior to 2010
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment		(4)	(14)
Australia [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment			(23)
Australia [Member] | Intentional irregularities [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment			0
Australia [Member] | Other errors [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment			(23)
Australia [Member] | Fiscal 2011 Adjustments
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment			(2)
Australia [Member] | Fiscal 2011 Adjustments | Intentional irregularities [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment			1
Australia [Member] | Fiscal 2011 Adjustments | Other errors [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment			(3)
Australia [Member] | Fiscal 2010 Adjustments
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment			(1)
Australia [Member] | Fiscal 2010 Adjustments | Intentional irregularities [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment			(4)
Australia [Member] | Fiscal 2010 Adjustments | Other errors [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment			3
Australia [Member] | Adjustments relating to fiscal 2009
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment			(23)
Australia [Member] | Adjustments relating to fiscal 2009 | Intentional irregularities [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment			(7)
Australia [Member] | Adjustments relating to fiscal 2009 | Other errors [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment			(16)
Australia [Member] | Adjustments relating to fiscal years prior to 2008
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment			3
Australia [Member] | Adjustments relating to fiscal years prior to 2008 | Intentional irregularities [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment			10
Australia [Member] | Adjustments relating to fiscal years prior to 2008 | Other errors [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment			$ (7)