Capital Stock (Activity In Stock Option Plans) (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted-average remaining contractual life of exercisable options, in years	2 years 6 months
Weighted-average remaining contractual life of options that are vested and expected to vest, in years	3 years 9 months 18 days
Employee Stock Option [Member]
Stock Option Plans [Roll Forward]
Outstanding options, beginning of year	28,935,453
Granted options	2,233,139
Cancelled options	(6,863,572)
Exercised options	(207,627)
Outstanding options, end of year	24,097,393
Exercisable options, end of year	15,116,752	[1]
Vested and expected to vest options, end of year	21,933,588	[2]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding weighted-average exercise price, beginning of year	26.37
Granted weighted-average exercise price	19.85
Canceled weighted-average exercise price	26.17
Exercised weighted-average exercise price	18.34
Outstanding weighted-average exercise price, end of year	25.92
Exercisable weighted-average exercise price, end of year	28.27	[1]
Vested and expected to vest weighted average exercise price, end of year	26.38	[2]
Outstanding aggregate intrinsic value, beginning of year	16.5
Outstanding aggregate intrinsic value, end of year	0.9
Exercisable aggregate intrinsic value, end of year	0	[1]
Vested and expected to vest aggregate intrinsic value, end of year	0.5	[2]

[1] The remaining weighted-average contractual life of these options is 2.5 years.

[2] The remaining weighted-average contractual life of these options is 3.8 years.