Consolidated Statements of Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]	Parent [Member]	Noncontrolling Interest [Member]
Common Stock, Shares, Outstanding		1,431.6
Balance, Amount at Oct. 01, 2017	$ 5,457.0	$ 1.4	$ 41.1	$ 5,563.2	$ (155.6)	$ 5,450.1	$ 6.9
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	4,518.0	0.0	0.0	4,518.3	0.0	4,518.3	(0.3)
Other comprehensive income/(loss)	(174.7)	0.0	0.0	0.0	(174.7)	(174.7)	0.0
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	253.8	0.0	253.8	0.0	0.0	253.8	0.0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	59.4	$ 0.0	59.4	0.0	0.0	59.4	0.0
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		8.4
Stock Issued During Period, Value, Employee Stock Purchase Plan	31.8	$ 0.0	31.8	0.0	0.0	31.8	0.0
Stock Issued During Period, Shares, Employee Stock Purchase Plans		0.6
Stock Repurchased and Retired During Period, Value	$ (7,208.7)	$ (0.1)	(345.0)	(6,863.6)	0.0	(7,208.7)	0.0
Stock Repurchased and Retired During Period, Shares		(131.5)
Common Stock, Dividends, Per Share, Declared	$ 1.32
Dividends, Cash	$ (1,760.5)	$ 0.0	0.0	(1,760.5)	0.0	(1,760.5)	0.0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	(0.3)						(0.3)
Balance, Amount at Sep. 30, 2018	1,175.8	$ 1.3	41.1	1,457.4	(330.3)	1,169.5	6.3
Common Stock, Shares, Outstanding		1,309.1
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	3,594.6	$ 0.0	0.0	3,599.2	0.0	3,599.2	(4.6)
Other comprehensive income/(loss)	(173.0)	0.0	0.0	0.0	(173.0)	(173.0)	0.0
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	311.3	0.0	311.3	0.0	0.0	311.3	0.0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	264.9	$ 0.0	264.9	0.0	0.0	264.9	0.0
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		14.7
Stock Issued During Period, Value, Employee Stock Purchase Plan	33.4	$ 0.0	33.4	0.0	0.0	33.4	0.0
Stock Issued During Period, Shares, Employee Stock Purchase Plans		0.4
Stock Repurchased and Retired During Period, Value	$ (10,131.5)	$ (0.1)	(609.6)	(9,521.8)	0.0	(10,131.5)	0.0
Stock Repurchased and Retired During Period, Shares		(139.6)
Common Stock, Dividends, Per Share, Declared	$ 1.49
Dividends, Cash	$ (1,801.6)	$ 0.0	0.0	(1,801.6)	0.0	(1,801.6)	0.0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	(0.5)						(0.5)
Balance, Amount at Sep. 29, 2019	(6,231.0)	1.2	41.1	(5,771.2)	(503.3)	(6,232.2)	1.2
Cumulative Effect of New Accounting Pronouncement in Period of Adoption	$ 495.6	$ 0.0	0.0	495.6	0.0	495.6	0.0
Common Stock, Shares, Outstanding	1,184.6	1,184.6
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 924.7	$ 0.0	0.0	928.3	0.0	928.3	(3.6)
Other comprehensive income/(loss)	133.9	0.0	0.0	0.0	133.9	133.9	0.0
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	252.1	0.0	252.1	0.0	0.0	252.1	0.0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	169.9	$ 0.0	169.9	0.0	0.0	169.9	0.0
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		8.5
Stock Issued During Period, Value, Employee Stock Purchase Plan	$ 37.2	$ 0.0	37.2	0.0	0.0	37.2	0.0
Stock Issued During Period, Shares, Employee Stock Purchase Plans	0.5	0.5
Stock Repurchased and Retired During Period, Value	$ (1,675.0)	$ 0.0	(126.4)	(1,548.6)	0.0	(1,675.0)	0.0
Stock Repurchased and Retired During Period, Shares		(20.3)
Common Stock, Dividends, Per Share, Declared	$ 1.23
Dividends, Cash	$ (1,436.8)	$ 0.0	0.0	(1,436.6)	0.0	(1,436.6)	(0.2)
Noncontrolling Interest, Increase from Sale of Parent Equity Interest	8.3						8.3
Balance, Amount at Sep. 27, 2020	(7,799.4)	1.2	373.9	(7,815.6)	(364.6)	(7,805.1)	5.7
Cumulative Effect of New Accounting Pronouncement in Period of Adoption	$ 17.3	$ 0.0	$ 0.0	$ 12.5	$ 4.8	$ 17.3	$ 0.0
Common Stock, Shares, Outstanding	1,173.3	1,173.3