Restructuring Activities (Restructuring Rollforward) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 18, 2016	Jun. 20, 2015	Jun. 18, 2016	Jun. 20, 2015
Restructuring Reserve [Roll Forward]
Restructuring costs	$ 0.0	$ 0.0	$ 3.9	$ 0.0
Restructuring and impairment costs	1.8	3.7	12.5	2.7
Amounts paid			(9.3)	(4.6)
Consumer Direct Operations [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			8.6	7.5
Restructuring and impairment costs			11.0	(0.2)
Amounts paid			(8.0)	(4.6)
Charges against assets			(7.1)	(0.7)
Restructuring reserve, ending balance	4.5	2.0	4.5	2.0
Consumer Direct Operations [Member] | Severance and employee related [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			2.1	1.0
Restructuring and impairment costs			1.2	1.4
Amounts paid			(3.3)	(1.7)
Restructuring reserve, ending balance	0.0	0.7	0.0	0.7
Consumer Direct Operations [Member] | Impairment of property and equipment [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			0.0	0.0
Restructuring and impairment costs			0.2	0.3
Amounts paid			0.0	0.0
Charges against assets			(0.2)	(0.3)
Restructuring reserve, ending balance	0.0	0.0	0.0	0.0
Consumer Direct Operations [Member] | Exit or disposal activities [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			6.5	6.5
Restructuring and impairment costs			9.6	(1.9)
Amounts paid			(4.7)	(2.9)
Charges against assets			(6.9)	(0.4)
Restructuring reserve, ending balance	$ 4.5	$ 1.3	$ 4.5	$ 1.3