Shareholders' Equity - Summary of Dividends Declared and Paid (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Sep. 24, 2016	Jun. 25, 2016	Mar. 26, 2016	Dec. 26, 2015	Sep. 30, 2017	Sep. 24, 2016	Sep. 26, 2015
Equity [Abstract]
Dividends per share (in dollars per share)	$ 0.63	$ 0.63	$ 0.57	$ 0.57	$ 0.57	$ 0.57	$ 0.52	$ 0.52	$ 2.4	$ 2.18	$ 1.98
Dividend amount	$ 3,252	$ 3,281	$ 2,988	$ 3,042	$ 3,071	$ 3,117	$ 2,879	$ 2,898	$ 12,563	$ 11,965