Segment Reporting (Financial Information For Reportable Operating Segments And All Other Segments) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2017	Sep. 29, 2019	Sep. 30, 2018	Oct. 01, 2017
Segment Reporting Information [Line Items]
Revenues	$ 6,747.0	$ 6,823.0	$ 6,305.9	$ 6,632.7	$ 6,303.6	$ 6,310.3	$ 6,031.8	$ 6,073.7	$ 26,508.6	$ 24,719.5	$ 22,386.8
Depreciation and amortization expenses									1,377.3	1,247.0	1,011.4
Income from equity investees									298.0	301.2	391.4
Operating income	1,083.3	$ 1,121.3	$ 857.7	$ 1,015.7	956.6	$ 1,038.2	$ 772.5	$ 1,116.1	4,077.9	3,883.3	4,134.7
Assets	19,219.6				24,156.4				$ 19,219.6	24,156.4	14,365.6
Operating Segments [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information, Description of Products and Services									Americas operations sell coffee and other beverages, complementary food, packaged coffees, single-serve coffee products and a focused selection of merchandise through company-operated stores and licensed stores.
Revenues									$ 18,259.0	16,748.6	15,629.4
Depreciation and amortization expenses									696.1	641.0	616.1
Income from equity investees									0.0	0.0	0.0
Operating income									3,782.8	3,485.2	3,577.2
Assets	4,446.7				4,473.7				$ 4,446.7	4,473.7	3,374.9
Operating Segments [Member] | International [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information, Description of Products and Services									International operations sell coffee and other beverages, complementary food, packaged coffees, single-serve coffee products and a focused selection of merchandise through company-operated stores and licensed stores.
Revenues									$ 6,190.7	5,551.2	4,204.3
Depreciation and amortization expenses									511.5	447.6	233.2
Income from equity investees									102.4	117.4	197.0
Operating income									964.7	872.8	835.6
Assets	6,724.6				6,361.9				$ 6,724.6	6,361.9	3,117.1
Operating Segments [Member] | Channel Development [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information, Description of Products and Services									Channel Development revenues include packaged coffee sales, tea and ready-to-drink beverages to customers outside of our company-operated and licensed stores. Historically revenues have included domestic and international sales of our packaged coffee, tea and ready-to-drink products to grocery, warehouse club and specialty retail stores and through institutional foodservice companies which serviced businesses. Since the fourth quarter of fiscal 2018, most of our Channel Development revenues are from product sales to and royalty revenues from Nestlé. The collaborative business relationships for ready-to-drink products and the associated revenues remain unchanged due to the Global Coffee Alliance.
Revenues									$ 1,992.6	2,297.3	2,256.6
Depreciation and amortization expenses									13.0	1.3	3.0
Income from equity investees									195.6	183.8	194.4
Operating income									697.5	927.1	967.0
Assets	132.2				148.2				132.2	148.2	129.1
Operating Segments [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenues									66.3	122.4	296.5
Depreciation and amortization expenses									156.7	157.1	159.1
Income from equity investees									0.0	0.0	0.0
Operating income									(1,367.1)	(1,401.8)	(1,245.1)
Assets	$ 7,916.1				$ 13,172.6				$ 7,916.1	$ 13,172.6	$ 7,744.5