Shareholders' Equity - Additional Information (Details) - USD ($) shares in Millions	6 Months Ended
	Mar. 30, 2019	Apr. 30, 2019
Schedule of Stock Repurchase Program [Line Items]
Maximum amount authorized for repurchase of common stock	$ 100,000,000,000
Share repurchase program, amount utilized	$ 61,300,000,000
Number of shares repurchased (in shares)	164.7
Amount of share repurchases	$ 32,200,000,000
Subsequent event
Schedule of Stock Repurchase Program [Line Items]
Maximum amount authorized for repurchase of common stock		$ 175,000,000,000
February 2019 accelerated share repurchase arrangement
Schedule of Stock Repurchase Program [Line Items]
Number of shares repurchased (in shares)	55.1
Amount of share repurchases, accelerated share repurchase arrangement	$ 12,000,000,000.0