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6. Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2018
Income Tax Disclosure [Abstract] |
U.S. and international components of income before taxes [Table Text Block] | The U.S. and international components of income before taxes are as follows (in millions):
|  | Year Ended December 31,
|  | 2018 |  | 2017 |  | 2016
U.S. |  | $ | 363.4 |  |  | $ | 72.8 |  |  | $ | (38.5 | )
International |  | 149.3 |  |  | 25.0 |  |  | 80.1 |
Income before taxes |  | $ | 512.7 |  |  | $ | 97.8 |  |  | $ | 41.6 |
Provision for income taxes [Table Text Block] | The provision for income taxes consists of the following (in millions):
|  | Year Ended December 31,
|  | 2018 |  | 2017 |  | 2016
Current tax expense: |  |  |  |  |  |  |  |  |
U.S. Federal |  | $ | 8.8 |  |  | $ | 6.7 |  |  | $ | 16.1 |
State |  | 2.2 |  |  | 3.4 |  |  | 3.1 |
International |  | 30.5 |  |  | 32.0 |  |  | 30.4 |
Current tax expense |  | 41.5 |  |  | 42.1 |  |  | 49.6 |
Deferred tax expense (benefit): |  |  |  |  |  |  |  |
U.S. Federal |  | 114.0 |  |  | (69.8 | ) |  | (42.4 | )
State |  | 6.6 |  |  | 4.3 |  |  | (2.8 | )
International |  | 0.3 |  |  | (19.3 | ) |  | (6.0 | )
Deferred tax expense (benefit) |  | 120.9 |  |  | (84.8 | ) |  | (51.2 | )
Non-current tax (benefit) expense |  | (15.4 | ) |  | 18.3 |  |  | 17.2 |
Provision for (benefit from) income taxes |  | $ | 147.0 |  |  | $ | (24.4 | ) |  | $ | 15.6 |
Reconcilation of effective tax rate on inocme before taxes and statutory rate [Table Text Block] | The reconciliation between our effective tax rate on income before taxes and the statutory tax rate is as follows:
|  | Year Ended December 31,
|  | 2018 |  | 2017 |  | 2016
U. S. statutory tax rate |  | 21 | % |  | 35 | % |  | 35 | %
Impact of foreign operations |  | (4 | ) |  | 6 |  |  | (15 | )
Foreign dividends, net |  | — |  |  | — |  |  | (40 | )
Research tax credits |  | (1 | ) |  | (4 | ) |  | (9 | )
Nontaxable subsidies |  | — |  |  | (2 | ) |  | (4 | )
Tax settlements and changes to unrecognized tax benefits |  | — |  |  | — |  |  | 47 |
Goodwill impairment |  | 6 |  |  | 1 |  |  | 11 |
Domestic manufacturing deduction |  | — |  |  | — |  |  | (4 | )
Share-based compensation |  | (1 | ) |  | (5 | ) |  | 3 |
Nondeductible executive compensation |  | — |  |  | 2 |  |  | 3 |
Fines and penalties |  | — |  |  | — |  |  | 2 |
Prior period adjustments |  | (1 | ) |  | — |  |  | 4 |
U.S. taxation of foreign income |  | 15 |  |  | 3 |  |  | 2 |
Acquisition-related |  | — |  |  | 10 |  |  | — |
U.S. tax reform |  | (10 | ) |  | (71 | ) |  | — |
State taxes |  | 2 |  |  | 3 |  |  | 1 |
Other |  | 2 |  |  | (3 | ) |  | 1 |
Provision for (benefit from) income taxes |  | 29 | % |  | (25 | )% |  | 37 | %
Significant components of deferred tax assets and liabilities [Table Text Block] | Deferred tax assets and liabilities reflect the tax effects of losses, credits, and temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of deferred tax assets and liabilities are as follows (in millions):
|  | December 31,
|  | 2018 |  | 2017
Deferred tax assets: |  |  |  |  |  |
Bad debt, inventory and warranty accruals |  | $ | 21.7 |  |  | $ | 28.6 |
Other post-employment benefits, vacation and other reserves |  | 23.0 |  |  | 24.0 |
Tax credit and net operating loss carryforwards |  | 75.3 |  |  | 73.3 |
Other |  | 27.1 |  |  | 19.7 |
Total gross deferred tax assets |  | 147.1 |  |  | 145.6 |
Valuation allowance |  | (70.8 | ) |  | (66.4 | )
Total deferred tax assets |  | 76.3 |  |  | 79.2 |
Deferred tax liabilities: |  |  |  |
Property and equipment |  | 40.1 |  |  | 33.5 |
Investments and intangible assets |  | 540.6 |  |  | 219.1 |
Total deferred tax liabilities |  | 580.7 |  |  | 252.6 |
Net deferred tax liabilities |  | $ | (504.4 | ) |  | $ | (173.4 | )
Tabular reconcilation of total amounts of unrecognized tax benefits [Table Text Block] | The following is a tabular reconciliation of the total amounts of unrecognized tax benefits (in millions):
|  | 2018 |  | 2017 |  | 2016
Unrecognized tax benefits – January 1 |  | $ | 54.9 |  |  | $ | 21.1 |  |  | $ | 11.9 |
Additions to tax positions related to prior years |  | 0.6 |  |  | 1.3 |  |  | 10.4 |
Reductions to tax positions related to prior years |  | (20.2 | ) |  | (1.0 | ) |  | — |
Additions to tax positions related to the current year |  | 4.6 |  |  | 34.8 |  |  | 3.4 |
Settlements |  | (6.8 | ) |  | (0.2 | ) |  | (2.4 | )
Lapse of statute of limitations |  | (1.1 | ) |  | (3.4 | ) |  | (2.3 | )
Currency translation |  | (2.2 | ) |  | 2.3 |  |  | 0.1 |
Unrecognized tax benefits – December 31 |  | $ | 29.8 |  |  | $ | 54.9 |  |  | $ | 21.1 |

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