Income Taxes Deferred Tax Assets (Liabilities), Net (Details) (USD $) In Millions	12 Months Ended
	Sep. 25, 2011
Tax Credit Carryforwards [Abstract]
Unused foreign tax credits	$ 20
Expiration of unused foreign tax credits	2013
Valuation Allowance [Abstract]
Valuation allowance on foreign deferred tax assets	76
Valuation allowance on state net operating losses	10
Valuation allowance on net capital losses	12
Federal [Member]
Operating Loss Carryforwards [Line Items]
Unused net operating loss carryforwards	167
Expiration of unused net operating loss carryforwards	2021 through 2029
Foreign [Member]
Operating Loss Carryforwards [Line Items]
Unused net operating loss carryforwards	76
Expiration of unused net operating loss carryforwards	2012 through 2020
State [Member]
Operating Loss Carryforwards [Line Items]
Unused net operating loss carryforwards	$ 352
Expiration of unused net operating loss carryforwards	2012 through 2031