Annual report pursuant to Section 13 and 15(d)

Summarized Quarterly Data (Unaudited) (Details)

v3.10.0.1
Summarized Quarterly Data (Unaudited) (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Sep. 30, 2018
Jun. 24, 2018
Mar. 25, 2018
Dec. 24, 2017
Sep. 24, 2017
Jun. 25, 2017
Mar. 26, 2017
Dec. 25, 2016
Sep. 30, 2018
Sep. 24, 2017
Sep. 25, 2016
Quarterly Financial Data [Abstract]                      
Revenues $ 5,803 [1] $ 5,599 $ 5,261 $ 6,068 $ 5,905 [1] $ 5,371 [1] $ 5,016 [1] $ 5,999 [1] $ 22,732 $ 22,291 $ 23,554
Operating income (loss) (654) [1],[2] 925 441 29 333 [1] 773 [1] 729 [1] 778 [1] 742 2,614 6,495
Net (loss) income $ (493) $ 1,219 $ 363 $ (5,953) 168 [1] 865 [1] 749 [1] 681 [1] (4,864) 2,465 5,702
Net income attributable to Qualcomm         $ 168 [1] $ 866 [1] $ 749 [1] $ 682 [1] $ (4,864) $ 2,466 $ 5,705
Basic earnings per share or attributable to Qualcomm - Net income $ (0.35) $ 0.82 $ 0.25 $ (4.03) $ 0.11 [3] $ 0.59 [3] $ 0.51 [3] $ 0.46 [3] $ (3.32) $ 1.67 $ 3.84
Diluted earnings per share or attributable to Qualcomm - Net income $ (0.35) $ 0.82 $ 0.24 $ (4.03) $ 0.11 [3] $ 0.58 [3] $ 0.50 [3] $ 0.46 [3] $ (3.32) $ 1.65 $ 3.81
Loss Contingencies [Line Items]                      
Income Tax Expense (Benefit)                 $ 5,377 $ 555 $ 1,131
EC [Member]                      
Loss Contingencies [Line Items]                      
Loss contingency, loss in period       $ 1,180         1,200    
NXP [Member]                      
Loss Contingencies [Line Items]                      
NXP termination fee $ 2,000                    
U.S. Tax Cuts and Jobs Act Effective 2018 [Member]                      
Loss Contingencies [Line Items]                      
Income Tax Expense (Benefit)       $ 5,900         $ 5,670    
[1] Amounts, other than per share amounts, are rounded to millions each quarter. Therefore, the sum of the quarterly amounts may not equal the annual amounts reported.
[2] Operating loss and net loss in the fourth quarter of fiscal 2018 were negatively impacted by a $2.0 billion charge related to the NXP termination fee. Net loss in the first quarter of fiscal 2018 was negatively impacted by a $5.9 billion provisional charge to income tax expense due to the effects of the Tax Legislation. Additionally, operating income and net loss in the first quarter of fiscal 2018 were negatively impacted by a $1.2 billion charge related to the EC fine.
[3] (Loss) earnings per share and earnings per share attributable to Qualcomm are computed independently for each quarter and the full year based upon respective average shares outstanding. Therefore, the sum of the quarterly (loss) earnings per share amounts may not equal the annual amounts reported.