Revision of Prior Period Financial Statements Revision of Prior Period Financial Statements (Details) - USD ($) $ / shares in Units, $ in Millions |
3 Months Ended | 12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 30, 2018 |
Sep. 30, 2018 |
Jun. 24, 2018 |
Mar. 25, 2018 |
Dec. 24, 2017 |
Sep. 24, 2017 |
Jun. 25, 2017 |
Sep. 30, 2018 |
Sep. 24, 2017 |
Oct. 01, 2018 |
|
| Prior Period Revision Adjustments [Line Items] | ||||||||||
| Net (loss) income | $ 1,068 | $ (5,983) | $ 157 | $ 855 | $ (4,964) | $ 2,444 | ||||
| Deferred tax assets (non-current) | 3,923 | $ 936 | 2,912 | 936 | 2,912 | $ 838 | ||||
| Total assets | 34,246 | 32,718 | 65,498 | 32,718 | 65,498 | |||||
| Other current liabilities | 6,831 | 6,978 | 4,789 | 6,978 | 4,789 | 7,103 | ||||
| Total current liabilities | 10,556 | 11,389 | 10,940 | 11,389 | 10,940 | |||||
| Total liabilities | 30,629 | 31,911 | 34,773 | 31,911 | 34,773 | |||||
| Retained earnings | 3,415 | 542 | 30,067 | 542 | 30,067 | $ 1,382 | ||||
| Total stockholders’ equity | 3,617 | 807 | 30,725 | 807 | 30,725 | |||||
| Total liabilities and stockholders’ equity | 34,246 | 32,718 | 65,498 | 32,718 | 65,498 | |||||
| Licensing revenues | 1,088 | 1,128 | $ 1,467 | $ 1,284 | 1,331 | 1,190 | 1,235 | 5,211 | 5,611 | |
| Revenues | 4,842 | 5,778 | 5,577 | 5,220 | 6,035 | 5,888 | 5,356 | 22,611 | 22,258 | |
| Operating (loss) income | 710 | (679) | 903 | 400 | (4) | 316 | 758 | 621 | 2,581 | |
| Income (loss) before income taxes | 559 | (800) | 934 | 317 | (60) | 417 | 843 | 392 | 2,987 | |
| Income tax benefit (expense) | 509 | 287 | 268 | 13 | (5,923) | (260) | 12 | (5,356) | (543) | |
| Net (loss) income attributable to Qualcomm | $ 1,068 | $ (513) | $ 1,202 | $ 330 | $ (5,983) | $ 157 | $ 856 | $ (4,964) | $ 2,445 | |
| Basic earnings (loss) per share | $ 0.88 | $ (0.36) | $ 0.81 | $ 0.22 | $ (4.05) | $ 0.11 | $ 0.58 | $ (3.39) | $ 1.66 | |
| Diluted earnings (loss) per share | $ 0.87 | $ (0.36) | $ 0.81 | $ 0.22 | $ (4.05) | $ 0.11 | $ 0.57 | $ (3.39) | $ 1.64 | |
| Total comprehensive (loss) income | $ 980 | $ 490 | $ (5,981) | $ 915 | $ (5,083) | $ 2,400 | ||||
| Comprehensive (loss) income attributable to Qualcomm | $ 1,056 | (5,981) | 916 | (5,083) | 2,401 | |||||
| Income tax provision (less than) in excess of income tax payments | (663) | 5,694 | 4,481 | (412) | ||||||
| Payroll, benefits and other liabilities | (576) | 1,121 | 808 | 2,136 | ||||||
| Net cash provided by operating activities | 1,762 | 3,895 | 5,001 | |||||||
| Other items, net | (36) | (25) | ||||||||
| Other assets | (148) | (62) | ||||||||
| Previously Reported [Member] | ||||||||||
| Prior Period Revision Adjustments [Line Items] | ||||||||||
| Net (loss) income | (5,953) | $ 168 | 865 | (4,864) | 2,465 | |||||
| Deferred tax assets (non-current) | $ 904 | 2,900 | 904 | 2,900 | ||||||
| Total assets | 32,686 | 65,486 | 32,686 | 65,486 | ||||||
| Other current liabilities | 6,825 | 4,756 | 6,825 | 4,756 | ||||||
| Total current liabilities | 11,236 | 10,907 | 11,236 | 10,907 | ||||||
| Total liabilities | 31,758 | 34,740 | 31,758 | 34,740 | ||||||
| Retained earnings | 663 | 30,088 | 663 | 30,088 | ||||||
| Total stockholders’ equity | 928 | 30,746 | 928 | 30,746 | ||||||
| Total liabilities and stockholders’ equity | 32,686 | 65,486 | 32,686 | 65,486 | ||||||
| Licensing revenues | 1,153 | 1,489 | 1,325 | 1,364 | 1,207 | 1,250 | 5,332 | 5,644 | ||
| Revenues | 5,803 | 5,599 | 5,261 | 6,068 | 5,905 | 5,371 | 22,732 | 22,291 | ||
| Operating (loss) income | (654) | 925 | 441 | 29 | 333 | 773 | 742 | 2,614 | ||
| Income (loss) before income taxes | (775) | 956 | 358 | (27) | 434 | 858 | 513 | 3,020 | ||
| Income tax benefit (expense) | 282 | 263 | 5 | (5,926) | (266) | 7 | (5,377) | (555) | ||
| Net (loss) income attributable to Qualcomm | $ (493) | $ 1,219 | $ 363 | $ (5,953) | $ 168 | $ 866 | $ (4,864) | $ 2,466 | ||
| Basic earnings (loss) per share | $ (0.35) | $ 0.82 | $ 0.25 | $ (4.03) | $ 0.11 | $ 0.59 | $ (3.32) | $ 1.67 | ||
| Diluted earnings (loss) per share | $ (0.35) | $ 0.82 | $ 0.24 | $ (4.03) | $ 0.11 | $ 0.58 | $ (3.32) | $ 1.65 | ||
| Total comprehensive (loss) income | $ 997 | $ 523 | $ (5,951) | $ 925 | $ (4,983) | $ 2,421 | ||||
| Comprehensive (loss) income attributable to Qualcomm | (5,951) | 926 | (4,983) | 2,422 | ||||||
| Income tax provision (less than) in excess of income tax payments | 5,697 | 4,502 | (400) | |||||||
| Payroll, benefits and other liabilities | 1,000 | 687 | 2,103 | |||||||
| Net cash provided by operating activities | 1,762 | 3,895 | 5,001 | |||||||
| Other items, net | 57 | |||||||||
| Other assets | (56) | |||||||||
| Reclassification Adjustment [Member] | ||||||||||
| Prior Period Revision Adjustments [Line Items] | ||||||||||
| Net (loss) income | 0 | |||||||||
| Income tax provision (less than) in excess of income tax payments | 0 | |||||||||
| Payroll, benefits and other liabilities | 88 | |||||||||
| Net cash provided by operating activities | 0 | |||||||||
| Other items, net | (82) | |||||||||
| Other assets | (6) | |||||||||
| Revision Adjustment [Member] | ||||||||||
| Prior Period Revision Adjustments [Line Items] | ||||||||||
| Net (loss) income | (30) | $ (11) | (10) | (100) | (21) | |||||
| Deferred tax assets (non-current) | $ 32 | 12 | 32 | 12 | ||||||
| Total assets | 32 | 12 | 32 | 12 | ||||||
| Other current liabilities | 153 | 33 | 153 | 33 | ||||||
| Total current liabilities | 153 | 33 | 153 | 33 | ||||||
| Total liabilities | 153 | 33 | 153 | 33 | ||||||
| Retained earnings | (121) | (21) | (121) | (21) | ||||||
| Total stockholders’ equity | (121) | (21) | (121) | (21) | ||||||
| Total liabilities and stockholders’ equity | 32 | 12 | 32 | 12 | ||||||
| Licensing revenues | (25) | (22) | (41) | (33) | (17) | (15) | (121) | (33) | ||
| Revenues | (25) | (22) | (41) | (33) | (17) | (15) | (121) | (33) | ||
| Operating (loss) income | (25) | (22) | (41) | (33) | (17) | (15) | (121) | (33) | ||
| Income (loss) before income taxes | (25) | (22) | (41) | (33) | (17) | (15) | (121) | (33) | ||
| Income tax benefit (expense) | 5 | 5 | 8 | 3 | 6 | 5 | 21 | 12 | ||
| Net (loss) income attributable to Qualcomm | $ (20) | $ (17) | $ (33) | $ (30) | $ (11) | $ (10) | $ (100) | $ (21) | ||
| Basic earnings (loss) per share | $ (0.01) | $ (0.01) | $ (0.03) | $ (0.02) | $ 0.00 | $ (0.01) | $ (0.07) | $ (0.01) | ||
| Diluted earnings (loss) per share | $ (0.01) | $ (0.01) | $ (0.02) | $ (0.02) | $ 0.00 | $ (0.01) | $ (0.07) | $ (0.01) | ||
| Total comprehensive (loss) income | $ (17) | $ (33) | $ (30) | $ (10) | $ (100) | $ (21) | ||||
| Comprehensive (loss) income attributable to Qualcomm | (30) | $ (10) | (100) | (21) | ||||||
| Income tax provision (less than) in excess of income tax payments | (3) | (21) | (12) | |||||||
| Payroll, benefits and other liabilities | 33 | 121 | 33 | |||||||
| Net cash provided by operating activities | 0 | 0 | $ 0 | |||||||
| Other items, net | 0 | |||||||||
| Other assets | 0 | |||||||||
| QTL [Member] | ||||||||||
| Prior Period Revision Adjustments [Line Items] | ||||||||||
| Total assets | 2,405 | $ 1,472 | $ 1,472 | |||||||
| Revenues | 1,018 | 1,266 | ||||||||
| Income (loss) before income taxes | $ 590 | 854 | ||||||||
| QTL [Member] | Revision Adjustment [Member] | ||||||||||
| Prior Period Revision Adjustments [Line Items] | ||||||||||
| Revenues | 33 | |||||||||
| Income (loss) before income taxes | $ 33 | |||||||||