Share-Based Payments Non-vested (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 29, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized on nonvested awards	$ 15.6
Compensation cost not yet recognized on nonvested awards, period for recognition	1 year
RSUs and DSUs
Equity Instruments Other than Options, Nonvested [Roll Forward]
Non-vested awards outstanding at the beginning of the period (in shares)	700,000
Granted (in shares)	300,000
Vested (in shares)	(200,000)
Forfeited (in shares)	(100,000)
Non-vested awards outstanding at the end of the period (in shares)	700,000
Non-vested, weighted-average grant date fair value at the beginning of the period (in dollars per unit)	$ 43.06
Granted, weighted-average grant date fair value (in dollars per unit)	$ 42.94
Vested, weighted-average grant date fair value (in dollars per unit)	$ 42.96
Forfeited, weighted-average grant date fair value (in dollars per unit)	$ 41.81
Non-vested, weighted-average grant date fair value at the end of the period (in dollars per unit)	$ 42.08
PUs
Equity Instruments Other than Options, Nonvested [Roll Forward]
Non-vested awards outstanding at the beginning of the period (in shares)	1,700,000
Granted (in shares)	0	700,000	600,000
Vested (in shares)	(600,000)
Forfeited (in shares)	(100,000)
Non-vested awards outstanding at the end of the period (in shares)	1,000,000	1,700,000
Non-vested, weighted-average grant date fair value at the beginning of the period (in dollars per unit)	$ 10.90
Granted, weighted-average grant date fair value (in dollars per unit)	$ 0.00
Vested, weighted-average grant date fair value (in dollars per unit)	$ 11.61
Forfeited, weighted-average grant date fair value (in dollars per unit)	$ 3.58
Non-vested, weighted-average grant date fair value at the end of the period (in dollars per unit)	$ 2.87	$ 10.90
Equity instruments other than options, vested in period, fair value	6.9	7.3	4.9
Performance shares (PSUs)
Equity Instruments Other than Options, Nonvested [Roll Forward]
Non-vested awards outstanding at the beginning of the period (in shares)	0
Granted (in shares)	200,000
Vested (in shares)	0
Forfeited (in shares)	0
Non-vested awards outstanding at the end of the period (in shares)	200,000
Non-vested, weighted-average grant date fair value at the beginning of the period (in dollars per unit)	$ 0.00
Granted, weighted-average grant date fair value (in dollars per unit)	$ 43.10
Vested, weighted-average grant date fair value (in dollars per unit)	$ 0.00
Forfeited, weighted-average grant date fair value (in dollars per unit)	$ 0.00
Non-vested, weighted-average grant date fair value at the end of the period (in dollars per unit)	$ 43.10
RSUs, DSUs, PUs and PSUs
Equity Instruments Other than Options, Nonvested [Roll Forward]
Equity instruments other than options, vested in period, fair value	$ 10.2	$ 9.4	$ 24.4