CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net loss	$ (295.6)	$ (76.7)	$ (304.4)
Other comprehensive income (loss)
Foreign currency translation adjustments	241.1	204.6	(777.1)
Pension and post-retirement plans:
Other comprehensive income (loss), net of tax (expense) benefit of $(2.2), ($0.9) and $3.2 for 2017, 2016 and 2015, respectively	2.5	7.5	(11.4)
Reclassifications, net of tax expense of $2.1 for 2017, $0.0 for 2016 and 2015	8.4	0.0	0.0
Total pension and post-retirement plans	10.9	7.5	(11.4)
Unrealized (loss) gain on available for sale securities:
Other comprehensive (loss) income, net of tax benefit (expense) of $0.4, $0.6 and ($0.6) for 2017, 2016 and 2015, respectively	(2.2)	(0.8)	1.1
Reclassifications, net of tax expense of $0.0 for 2017, 2016 and 2015	0.5	0.0	0.0
Other comprehensive (loss) income, net of tax benefit (expense) of $0.4, $0.6 and ($0.6) for 2017, 2016 and 2015, respectively	(1.7)	(0.8)	1.1
Derivative financial instrument revaluation:
Other comprehensive loss before reclassifications, net of tax (expense) benefit of $(4.3), $0.0 and $4.4 for 2017, 2016 and 2015, respectively	(4.6)	(9.6)	(8.1)
Reclassifications, net of tax expense of $0.0 for 2017, 2016 and 2015	10.4	11.9	0.0
Total unrealized gain (loss) arising on qualified hedging derivatives	5.8	2.3	(8.1)
Other comprehensive income (loss)	256.1	213.6	(795.5)
Comprehensive (loss) income	(39.5)	136.9	(1,099.9)
Comprehensive (income) loss attributable to the non-controlling interests	(4.3)	1.0	35.8
Comprehensive income (loss) attributable to stockholders	$ (43.8)	$ 137.9	$ (1,064.1)