Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Information [Line Items]
Number of Reportable Segments	2
Number of operating segments which do not meet reportable unit quantitative threshold	2
Net sales	$ 2,652.3	$ 2,411.7
Income (loss) from operations	135.8	120.1
Depreciation and amortization expense	(52.0)	(52.0)
Corporate [Member]
Segment Information [Line Items]
Net sales	1,505.6	1,403.9
Income (loss) from operations	101.1	94.1
Depreciation and amortization expense	(24.1)	(24.4)
Public [Member]
Segment Information [Line Items]
Net sales	969.9	846.8
Income (loss) from operations	54.1	45.6
Depreciation and amortization expense	(10.9)	(11.0)
Other [Member]
Segment Information [Line Items]
Net sales	176.8	161.0
Income (loss) from operations	6.5	6.1
Depreciation and amortization expense	(2.1)	(2.3)
Headquarters [Member]
Segment Information [Line Items]
Net sales	0	0
Income (loss) from operations	(25.9)	(25.7)
Depreciation and amortization expense	$ (14.9)	$ (14.3)