Shareholders' Equity (Details 2)	3 Months Ended								12 Months Ended
	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Weighted-average shares outstanding for basic and diluted
Basic weighted-average shares outstanding	282,308,000	281,525,000	280,163,000	273,200,000	277,780,000	281,813,000	281,114,000	280,022,000	279,299,000	280,182,000	277,684,000
Dilutive effect of:
Convertible notes and warrants									4,801,000	14,053,000	28,869,000
Stock options and restricted stock units									328,000	428,000	702,000
Diluted weighted-average shares outstanding	282,707,000	281,710,000	283,824,000	288,978,000	291,562,000	296,920,000	295,547,000	294,632,000	284,428,000	294,663,000	307,255,000
Anti-dilutive effect of weighted average shares									5,000,000	7,000,000	5,000,000