QUALCOMM Incorporated Annual report pursuant to Section 13 and 15(d)

Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2018	Sep. 24, 2017	Sep. 25, 2016
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Beginning Balance	$ 874	$ 755	$ 641
Valuation Allowances and Reserves, Charged (Credited) to Costs and Expenses	711	119	114
Valuation Allowances and Reserves, Ending Balance	1,585	874	755
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Beginning Balance	11	1	6
Valuation Allowances and Reserves, Charged (Credited) to Costs and Expenses	45	10	(5)
Valuation Allowances and Reserves, Ending Balance	56	11	1
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Beginning Balance	863	754	635
Valuation Allowances and Reserves, Charged (Credited) to Costs and Expenses	666	109	119
Valuation Allowances and Reserves, Ending Balance	$ 1,529	$ 863	$ 754