Restructuring Activities (Restructuring Rollforward) (Details) - USD ($) $ in Millions	3 Months Ended		8 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 10, 2016	Sep. 10, 2016	Sep. 30, 2017
Restructuring Reserve [Roll Forward]
Restructuring costs	$ 1.2	$ 0.3	$ 4.2	$ 8.3
Restructuring and impairment costs	23.0	0.9	13.4	65.6
Amounts paid			(11.2)	(58.9)
2016 Plan [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance				2.0
Restructuring and impairment costs				66.8
Amounts paid				(54.5)
Charges against assets				(11.8)
Restructuring reserve, ending balance	2.5			2.5
2016 Plan [Member] | Severance and employee related [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance				0.8
Restructuring and impairment costs				3.2
Amounts paid				(3.8)
Restructuring reserve, ending balance	0.2			0.2
2016 Plan [Member] | Impairment of property and equipment [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance				0.0
Restructuring and impairment costs				8.0
Charges against assets				(8.0)
Restructuring reserve, ending balance	0.0			0.0
2016 Plan [Member] | Exit or disposal activities [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance				1.2
Restructuring and impairment costs				55.6
Amounts paid				(50.7)
Charges against assets				(3.8)
Restructuring reserve, ending balance	2.3			2.3
2017 Plan [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance				0.0
Restructuring and impairment costs				6.5
Amounts paid				(1.7)
Charges against assets				(2.6)
Restructuring reserve, ending balance	2.2			2.2
2017 Plan [Member] | Severance and employee related [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance				0.0
Restructuring and impairment costs				3.8
Amounts paid				(1.7)
Restructuring reserve, ending balance	2.1			2.1
2017 Plan [Member] | Impairment of property and equipment [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance				0.0
Restructuring and impairment costs				1.6
Charges against assets				(1.6)
Restructuring reserve, ending balance	0.0			0.0
2017 Plan [Member] | Exit or disposal activities [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance				0.0
Restructuring and impairment costs				1.1
Charges against assets				(1.0)
Restructuring reserve, ending balance	0.1			0.1
Consumer Direct Operations [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			8.6	1.7
Restructuring and impairment costs			11.0	(0.7)
Amounts paid			(9.0)	(0.3)
Charges against assets			(7.1)
Restructuring reserve, ending balance	0.7	3.5	3.5	0.7
Consumer Direct Operations [Member] | Severance and employee related [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			2.1	0.0
Restructuring and impairment costs			1.2
Amounts paid			(3.3)
Restructuring reserve, ending balance	0.0	0.0	0.0	0.0
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	0.0
Amounts paid			0.0	0.0
Charges against assets			(0.2)
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	1.7
Restructuring and impairment costs			9.6	(0.7)
Amounts paid			(5.7)	(0.3)
Charges against assets			(6.9)
Restructuring reserve, ending balance	$ 0.7	$ 3.5	$ 3.5	$ 0.7