Shareholders' Equity - Repurchases of Common Shares in Open Market (Detail) - Open Market Repurchases - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended					12 Months Ended
	Dec. 31, 2016	Sep. 24, 2016	Jun. 25, 2016	Mar. 26, 2016	Dec. 26, 2015	Sep. 24, 2016
Stock Repurchase Program [Line Items]
Number of shares repurchased (in shares)	44,333	28,579	41,238	71,766	25,984	167,567
Average repurchase price per share (in dollars per share)	$ 112.78	$ 104.97	$ 97.00	$ 97.54	$ 115.45
Amount	$ 5,000	$ 3,000	$ 4,000	$ 7,000	$ 3,000	$ 17,000