Earnings Per Share (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 28, 2014	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Earnings Per Share
Shares repurchased under ASR	4,300,000
Value of shares repurchased under ASR	$ 150
Shares required for settlement of accelerated share repurchase agreement		278,000		278,000
Weighted-average shares outstanding for basic and diluted
Basic weighted-average shares outstanding		278,860,000	281,525,000	280,096,000	278,296,000
Dilutive effect of:
Stock options		1,892,000	185,000	2,027,000	221,000
ASR		278,000		301,000
Convertible notes and warrants					6,226,000
Diluted weighted-average shares outstanding		281,030,000	281,710,000	282,424,000	284,743,000
Anti-dilutive effect of weighted average shares		2,000,000	6,000,000	2,000,000	5,000,000