Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before-tax reclassification of net actuarial gains/(losses)	$ (5.0)	$ (2.1)	$ (4.9)
Amounts reclassified from accumulated other comprehensive loss, tax benefit	5.2	9.2	10.6
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	3,397.4	2,749.1	2,137.6
Other comprehensive loss, net of tax, before reclassifications	(12.7)	(48.3)	53.5
Amounts reclassified from accumulated other comprehensive loss, net of tax	12.2	17.3	21.2
Less: noncontrolling interest	0.5	31.0	(74.7)
Other comprehensive income (loss)	(3.5)	(34.0)	70.5
Sale/Transfer of interests in partially-owned leasing subsidiaries		0.3	13.2
Repurchase of interests in partially-owned leasing subsidiary			(11.8)
Ending balance	4,048.7	3,397.4	2,749.1
Cost of sales
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before-tax reclassification of net actuarial gains/(losses)	4.2	1.7	4.0
Currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive loss, tax benefit	0.0	0.0	0.0
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(18.5)	(16.5)	(16.5)
Other comprehensive loss, net of tax, before reclassifications	(6.0)	(2.0)	0.0
Amounts reclassified from accumulated other comprehensive loss, net of tax	0.0	0.0	0.0
Other comprehensive income (loss)	(6.0)	(2.0)	0.0
Ending balance	(24.5)	(18.5)	(16.5)
Currency translation adjustments attributable to noncontrolling interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Less: noncontrolling interest	0.0	0.0	0.0
Unrealized loss on derivative financial instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive loss, tax benefit	3.4	8.4	8.7
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(6.6)	(18.7)	(34.8)
Other comprehensive loss, net of tax, before reclassifications	(0.7)	(1.2)	0.8
Amounts reclassified from accumulated other comprehensive loss, net of tax	9.0	16.0	18.1
Other comprehensive income (loss)	5.3	11.8	14.7
Sale/Transfer of interests in partially-owned leasing subsidiaries		0.3	13.2
Repurchase of interests in partially-owned leasing subsidiary			(11.8)
Ending balance	(1.3)	(6.6)	(18.7)
Unrealized loss on derivative financial instruments attributable to noncontrolling interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Less: noncontrolling interest	(3.0)	(3.0)	(4.2)
Net actuarial gains/(losses) of defined benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive loss, tax benefit	1.8	0.8	1.9
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(86.8)	(43.0)	(98.8)
Other comprehensive loss, net of tax, before reclassifications	(6.0)	(45.1)	52.7
Amounts reclassified from accumulated other comprehensive loss, net of tax	3.2	1.3	3.1
Other comprehensive income (loss)	(2.8)	(43.8)	55.8
Ending balance	(89.6)	(86.8)	(43.0)
Net actuarial gains/(losses) of defined benefit plans attributable to noncontrolling interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Less: noncontrolling interest	0.0	0.0	0.0
Accumulated Other Comprehensive Loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(111.9)	(78.2)	(150.1)
Less: noncontrolling interest	3.5	34.0	(70.5)
Ending balance	(115.4)	(111.9)	(78.2)
Accumulated Other Comprehensive Loss attributable to noncontrolling interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	401.5	347.0	84.6
Less: noncontrolling interest	(3.0)	(3.0)	(4.2)
Ending balance	$ 394.8	$ 401.5	$ 347.0