Income Taxes - Tax Provision (Benefit), Reconciliation, and Tax Rates (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
United States	$ (59.1)	$ (63.6)	$ (152.3)
Foreign	296.4	248.5	131.2
Income (loss) before income taxes	237.3	184.9	(21.1)
Current:
U.S. federal statutory tax	(4.0)	8.2	94.6
State	1.6	(1.6)	5.6
Foreign	35.9	46.3	34.2
Total current income tax provision (benefit)	33.5	52.9	134.4
Deferred:
U.S. federal statutory tax	11.0	4.0	15.1
State	4.6	(6.2)	8.9
Foreign	(12.2)	(1.0)	(10.0)
Total deferred income (loss) before income taxes	3.4	3.2	13.9
Non-current tax expense (income)	19.3	6.2	0.9
Income tax provision	$ 56.2	$ 55.9	$ 149.2
Reconciliation of U.S. federal statutory income tax rate to effective income tax rate
U.S. federal statutory tax rate	21.00%	21.00%	35.00%
Foreign earnings, net of foreign taxes	(13.80%)	(11.60%)	245.40%
State income taxes, net of U.S. federal income tax benefit	2.20%	(3.30%)	(51.80%)
U.S. tax on deemed dividends	0.90%	(0.40%)	(14.00%)
Tax Act - Transition Tax	0.005	0.007	(7.043)
Tax Reform - GILTI	6.00%	9.70%	0.00%
Tax Reform - BEAT	0.10%	2.80%	0.00%
Deferred tax impact on foreign unrepatriated earnings	0.50%	(1.00%)	(65.50%)
Goodwill impairment	0.00%	0.00%	(81.50%)
Uncertain tax positions	8.20%	3.40%	(4.10%)
Foreign currency adjustments	(6.10%)	2.20%	(0.70%)
Intercompany interest transfer pricing adjustment	1.40%	1.50%	0.00%
Tax authority settlements	0.00%	0.00%	(10.00%)
Nontaxable interest income	(2.30%)	(2.70%)	36.90%
Nondeductible interest expense	1.80%	0.00%	(12.60%)
Valuation allowance	1.20%	3.00%	(19.60%)
Other permanent differences	2.40%	5.00%	(60.40%)
Effective income tax rate	23.70%	30.20%	(707.10%)
Effective income tax rate	23.70%	30.20%	(707.10%)
Provision for income taxes	$ 56.2	$ 55.9	$ 149.2
Transition tax toll charge on historic accumulated foreign earnings		$ 143.7	$ 143.7
Provisional undistributed accumulated earnings of foreign subsidiary	923.9
Foreign withholding tax, if undistributed earnings are no reinvested indefinitely	203.3
Accumulated foreign earnings deemed repatriated	1,300.0
Provisional estimate of the associated foreign withholding and state income tax effects	$ 12.0
Without transition tax toll charge
Reconciliation of U.S. federal statutory income tax rate to effective income tax rate
Effective income tax rate		(25.90%)	(25.90%)
Effective income tax rate		(25.90%)	(25.90%)