Other Liabilities (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Minimum [Member]
Unfavorable contracts and lease exit liabilities included in other accrued and other long-term liabilities
Remaining non-cancellable terms, range	1 year
Maximum [Member]
Unfavorable contracts and lease exit liabilities included in other accrued and other long-term liabilities
Remaining non-cancellable terms, range	16 years
Unfavorable contracts [Member] \| Allied [Member]
Unfavorable contracts and lease exit liabilities included in other accrued and other long-term liabilities
Restructuring reserve, Beginning balance	$ 37.6	$ 49.0
Payments / Amortization	(9.5)	(10.1)
Adjustments	(5.3)	(1.3)
Restructuring reserve, Ending balance	22.8	37.6
Unfavorable contracts and lease exit liabilities [Member] \| Allied [Member]
Unfavorable contracts and lease exit liabilities included in other accrued and other long-term liabilities
Restructuring reserve, Beginning balance	42.6	55.4
Payments / Amortization	(10.9)	(11.5)
Adjustments	(5.9)	(1.3)
Restructuring reserve, Ending balance	25.8	42.6
Lease Exit Costs [Member] \| Allied [Member]
Unfavorable contracts and lease exit liabilities included in other accrued and other long-term liabilities
Restructuring reserve, Beginning balance	5.0	6.4
Payments / Amortization	(1.4)	(1.4)
Adjustments	(0.6)
Restructuring reserve, Ending balance	$ 3.0	$ 5.0