Incentive Compensation Plans (Stock Options) (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 36.6
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	37.0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding shares subject to option, at beginning of period	2,360,275
Outstanding weighted average exercise price per share, at beginning of period	$ 44.16
Outstanding shares subject to option, granted	332,210
Outstanding weighted average exercise price per share, granted	$ 64.02
Outstanding shares subject to option, exercised	(494,638)
Outstanding weighted average exercise price per share, exercised	$ 35.88
Outstanding shares subject to option, at end of period	2,192,136	2,360,275
Outstanding weighted average exercise price per share, at end of period	$ 48.95	$ 44.16
Exercisable shares subject to option exercisable at end of period, at end of period	1,583,642
Exercisable weighted average exercise price per share, at end of period	$ 41.54
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Total intrinsic value of options exercised	$ 20.4	$ 38.5	$ 23.5
Average remaining contractual life for outstanding options (in years)	6 years 2 months 12 days
Average remaining contractual life of exercisable options (in years)	5 years
Weighted average estimated grant date fair value	$ 19.17	$ 27.61	$ 19.73
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term awards become exercisable	3 years
Term options expire from grant date (in years)	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Dividend yield	3.30%	2.90%	2.50%
Expected volatility	40.00%	41.00%	39.00%
Risk-free interest rate	2.10%	2.00%	1.20%
Expected life (in years)	7 years	7 years	8 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding shares subject to option, expired/forfeited	(5,711)
Outstanding weighted average exercise price per share, expired/forfeited	$ 78.49