Cover Page - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Sep. 26, 2020	Oct. 16, 2020	Mar. 27, 2020
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Sep. 26, 2020
Document Transition Report	false
Entity File Number	001-36743
Entity Registrant Name	Apple Inc.
Entity Incorporation, State or Country Code	CA
Entity Tax Identification Number	94-2404110
Entity Address, Address Line One	One Apple Park Way
Entity Address, City or Town	Cupertino
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95014
City Area Code	408
Local Phone Number	996-1010
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 1,070,633
Entity Common Stock, Shares Outstanding (in shares)		17,001,802
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Central Index Key	0000320193
Current Fiscal Year End Date	--09-26
Common Stock, $0.00001 par value per share
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, $0.00001 par value per share
Trading Symbol	AAPL
Security Exchange Name	NASDAQ
1.000% Notes due 2022
Entity Information [Line Items]
Title of 12(b) Security	1.000% Notes due 2022
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ
1.375% Notes due 2024
Entity Information [Line Items]
Title of 12(b) Security	1.375% Notes due 2024
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ
0.000% Notes due 2025
Entity Information [Line Items]
Title of 12(b) Security	0.000% Notes due 2025
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ
0.875% Notes due 2025
Entity Information [Line Items]
Title of 12(b) Security	0.875% Notes due 2025
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ
1.625% Notes due 2026
Entity Information [Line Items]
Title of 12(b) Security	1.625% Notes due 2026
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ
2.000% Notes due 2027
Entity Information [Line Items]
Title of 12(b) Security	2.000% Notes due 2027
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ
1.375% Notes due 2029
Entity Information [Line Items]
Title of 12(b) Security	1.375% Notes due 2029
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ
3.050% Notes due 2029
Entity Information [Line Items]
Title of 12(b) Security	3.050% Notes due 2029
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ
0.500% Notes due 2031
Entity Information [Line Items]
Title of 12(b) Security	0.500% Notes due 2031
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ
3.600% Notes due 2042
Entity Information [Line Items]
Title of 12(b) Security	3.600% Notes due 2042
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ