Guarantees (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 30, 2011	Sep. 30, 2011
Guarantees disclosure
Total liabilities under Tax Sharing Agreement, fair value	$ 437	$ 436
Current liabilities under Tax Sharing Agreement, fair value	49	49
Performance guarantee obligations, fair value	4	4
Roll-forward of warranty accrual:
Warranty accrual, balance at the beginning of the period	51
Warranties issued	5
Changes in estimates	(1)
Settlements	(6)
Currency translation	(1)
Warranty accrual, balance at the end of the period	$ 48