Shareholders' Equity (Details) - USD ($)	May 23, 2016	Sep. 28, 2015	Oct. 31, 2015	Sep. 23, 2015
Class of Stock [Line Items]
Number of shares acquired	2,396,788
Master Confirmation And Supplemental Confirmation
Class of Stock [Line Items]
Number of shares acquired		32,319,392
September 23, 2015
Class of Stock [Line Items]
Value of shares repurchased		$ 1,500,000,000	$ (1,500,000,000)	$ 1,500,000,000
Number of shares acquired		34,716,180