Accumulated Other Comprehensive Loss, Net of Tax Changes in AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Changes in fair value of available-for-sale securities	$ 0.5	$ 0.5	$ 0.7
Changes in fair value of derivative instruments	0.0	0.0	(0.6)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(125.0)	(240.4)
Total Reclassification from AOCI	8.1	31.5	7.2
Accumulated Other Comprehensive Income (Loss), Net of Tax	(962.5)	(845.6)	(636.7)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	(54.8)	(252.6)
Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	3.7	23.3
Foreign Currency Translation Adjustment, Net of Tax	(716.7)	(665.6)	(436.3)
Available-for-sale Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Changes in fair value of available-for-sale securities	0.5	0.5
Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	(1.2)	0.0
Available-for-sale Securities Adjustment, Net of Tax	0.6	1.3	0.8
Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Changes in fair value of derivative instruments	0.0	0.0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	1.2	1.3
Cumulative Changes in Net Gain (Loss) from Hedges, Effect Net of Tax	(8.4)	(9.6)	(10.9)
Defined Benefit and Postretirement Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pension and Other Postretirement Benefit Plans, Adjustment, before Reclassification Adjustments and Tax	(70.7)	11.7
Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Net of Tax	4.4	6.9
Pension and Other Postretirement Benefit Plans, Net of Tax	$ 238.0	$ (171.7)	$ (190.3)