Income Taxes (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax [Line Items]
Non-deductible interest	$ 84.7	$ 89.3
Decrease in Unrecognized Tax Benefits is Reasonably Possible	2.1
Foreign tax credit carryforwards	$ 135.3	105.9
Foreign tax credit carryforwards, expiration date	Dec. 31, 2024
Foreign earnings taxable as dividend	$ 3.8	$ 307.6	$ 1,300.0
Net operating loss carryforwards, expiration date	Dec. 31, 2020
Statutory income tax rate	19.00%	19.00%	19.30%
Deferred tax liabilities	$ 505.2	$ 297.2
Tax Cuts and Jobs Act of 2017, transition tax for accumulated foreign earnings, provisional income tax expense	11.8	148.7
Effective income tax rate reconciliation, repatriation of foreign earnings, amount	307.0	2,600.0
Tax Cuts and Jobs Act of 2017, change in tax rate, deferred tax asset, provisional income tax expense	25.6
Undistributed Earnings of Foreign Subsidiaries	2,900.0
Income tax holiday, aggregate dollar amount	$ 3.4
Income tax holiday, income tax benefits (in dollars per share)	$ 0.01
Foreign tax authority
Income Tax [Line Items]
Tax Cuts and Jobs Act of 2017, change in tax rate, deferred tax asset, provisional income tax expense		9.7
Domestic tax authority
Income Tax [Line Items]
Tax Cuts and Jobs Act of 2017, change in tax rate, deferred tax asset, provisional income tax expense		18.9
Saudi Arabia | Foreign tax authority
Income Tax [Line Items]
Operating loss carryforwards	$ 249.5
Mexico | Foreign tax authority
Income Tax [Line Items]
Operating loss carryforwards	184.4
Norway | Foreign tax authority
Income Tax [Line Items]
Operating loss carryforwards	261.3
NETHERLANDS | Foreign tax authority
Income Tax [Line Items]
Operating loss carryforwards	94.1
MALAYSIA | Foreign tax authority
Income Tax [Line Items]
Operating loss carryforwards	108.0
UNITED STATES | Foreign tax authority
Income Tax [Line Items]
Operating loss carryforwards	168.6
CANADA | Foreign tax authority
Income Tax [Line Items]
Operating loss carryforwards	84.2
Brazil | Foreign tax authority
Income Tax [Line Items]
Operating loss carryforwards	184.1
UNITED KINGDOM | Foreign tax authority
Income Tax [Line Items]
Operating loss carryforwards	159.9
Accrued Interest and Penalties
Income Tax [Line Items]
Unrecognized Tax Benefits	0.1	2.8	$ 5.9
Federal, State and Foreign Tax
Income Tax [Line Items]
Unrecognized Tax Benefits	80.7	$ 91.0	$ 90.4
Unrecorded tax credit [Member]
Income Tax [Line Items]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	105.9
Deferred tax assets, wrote off [Member]
Income Tax [Line Items]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	42.0
Deferred tax assets, affiliates [Member]
Income Tax [Line Items]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	33.0
Deferred tax assets, future tax benefits [Member]
Income Tax [Line Items]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 17.9