Goodwill and Other Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Changes in the carrying amount of goodwill
Goodwill, Beginning Balance	$ 2,857.8	$ 2,856.5
Accumulated impairment losses, Beginning Balance	(277.0)	(73.0)
Goodwill, net of accumulated impairment losses, Beginning Balance	2,580.8	2,783.5
Goodwill impairment		(204.0)	(73.0)
Acquisitions	33.3	54.1
Currency translation	11.9	(52.8)
Goodwill, Ending Balance	2,903.0	2,857.8	2,856.5
Accumulated impairment losses, Ending Balance	(277.0)	(277.0)	(73.0)
Goodwill, net of accumulated impairment losses, Ending Balance	2,626.0	2,580.8	2,783.5
Americas [Member]
Changes in the carrying amount of goodwill
Goodwill, Beginning Balance	1,562.8	1,547.9
Accumulated impairment losses, Beginning Balance	(277.0)	(73.0)
Goodwill, net of accumulated impairment losses, Beginning Balance	1,285.8	1,474.9
Goodwill impairment		(204.0)
Acquisitions	26.7	13.1
Currency translation	(0.8)	1.8
Goodwill, Ending Balance	1,588.7	1,562.8
Accumulated impairment losses, Ending Balance	(277.0)	(277.0)
Goodwill, net of accumulated impairment losses, Ending Balance	1,311.7	1,285.8
Europe [Member]
Changes in the carrying amount of goodwill
Goodwill, Beginning Balance	1,107.1	1,173.1
Accumulated impairment losses, Beginning Balance	0	0
Goodwill, net of accumulated impairment losses, Beginning Balance	1,107.1	1,173.1
Acquisitions	6.6	3.7
Currency translation	4.7	(69.7)
Goodwill, Ending Balance	1,118.4	1,107.1
Accumulated impairment losses, Ending Balance	0	0
Goodwill, net of accumulated impairment losses, Ending Balance	1,118.4	1,107.1
Asia Pacific [Member]
Changes in the carrying amount of goodwill
Goodwill, Beginning Balance	187.9	135.5
Accumulated impairment losses, Beginning Balance	0	0
Goodwill, net of accumulated impairment losses, Beginning Balance	187.9	135.5
Acquisitions		37.3
Currency translation	8.0	15.1
Goodwill, Ending Balance	195.9	187.9
Accumulated impairment losses, Ending Balance	0	0
Goodwill, net of accumulated impairment losses, Ending Balance	$ 195.9	$ 187.9

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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+ Details

- Definition

The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

+ References+ Details

- Definition

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

+ References

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+ Details