Shareholders' Equity - Accelerated Share Repurchase Activity and Related Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	2 Months Ended	3 Months Ended		4 Months Ended
	Dec. 30, 2017	Dec. 30, 2017	Sep. 30, 2017	Nov. 30, 2017	Aug. 31, 2017	May 31, 2017	Feb. 28, 2017	Nov. 30, 2016
November 2017 ASR
Accelerated Share Repurchases [Line Items]
Stock repurchase program completion date	2018-02
Number of shares repurchased (in shares)	23,602
ASR amount	$ 5,000
August 2017 ASR
Accelerated Share Repurchases [Line Items]
Stock repurchase program completion date				2017-11
Number of shares repurchased (in shares)		3,800	15,100	18,887
Average repurchase price per share (in dollars per share)				$ 158.84
ASR amount				$ 3,000
May 2017 ASR
Accelerated Share Repurchases [Line Items]
Stock repurchase program completion date					2017-08
Number of shares repurchased (in shares)					20,108
Average repurchase price per share (in dollars per share)					$ 149.20
ASR amount					$ 3,000
February 2017 ASR
Accelerated Share Repurchases [Line Items]
Stock repurchase program completion date						2017-05
Number of shares repurchased (in shares)						20,949
Average repurchase price per share (in dollars per share)						$ 143.20
ASR amount						$ 3,000
November 2016 ASR
Accelerated Share Repurchases [Line Items]
Stock repurchase program completion date							2017-02
Number of shares repurchased (in shares)							51,157
Average repurchase price per share (in dollars per share)							$ 117.29
ASR amount							$ 6,000
August 2016 ASR
Accelerated Share Repurchases [Line Items]
Stock repurchase program completion date								2016-11
Number of shares repurchased (in shares)								26,850
Average repurchase price per share (in dollars per share)								$ 111.73
ASR amount								$ 3,000