Segment Reporting (Information by Geographic Area) (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
Revenues from External Customers and Long-Lived Assets [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
Long-lived assets	13,565.7				11,662.2				13,565.7	11,662.2	9,082.3
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									18,622.7	17,409.4	16,527.1
Long-lived assets	7,330.2				5,635.9				7,330.2	5,635.9	5,848.3
Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									7,885.9	7,310.1	5,859.7
Long-lived assets	$ 6,235.5				$ 6,026.3				$ 6,235.5	$ 6,026.3	$ 3,234.0