Goodwill and Other Intangible Assets, net - Gross Amount of Goodwill and Accumulated Impairment Losses by Segment (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Gross amount of goodwill and accumulated impairment losses:
Gross Carrying Amount	$ 2,023.6	$ 2,060.2
Accumulated Impairment Losses	206.6	206.6
Net Carrying Amount	1,817.0	1,853.6
Americas
Gross amount of goodwill and accumulated impairment losses:
Gross Carrying Amount	1,258.0	1,248.9
Accumulated Impairment Losses	206.6	206.6
Net Carrying Amount	1,051.4	1,042.3
EMEA-APAC
Gross amount of goodwill and accumulated impairment losses:
Gross Carrying Amount	765.6	811.3
Accumulated Impairment Losses	0.0	0.0
Net Carrying Amount	$ 765.6	$ 811.3