Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign

Components of income (loss) before income taxes for the years ended December 31, 2019, 2018 and 2017, are presented below:

	2019			2018		2017
United States	$	(9.3	)	$	168.3	$	91.6
Foreign	26.7			11.5		9.7
Noncontrolling interests	51.8			58.1		61.4
Income before income taxes	$	69.2		$	237.9	$	162.7

Schedule of Deferred Tax Assets and Liabilities

Significant components of deferred tax assets and liabilities at December 31, 2019 and 2018 are presented below:

	2019			2018
Deferred tax assets:
Net operating and capital loss and tax credit carryforwards	$	496.2		$	516.7
Postretirement benefits	87.9			81.8
Pension benefits	84.2			114.1
Leases	63.3			—
Inventories	23.4			38.5
Other assets	78.9			65.1
Valuation allowance	(659.4		)	(693.5		)
Total deferred tax assets	174.5			122.7
Deferred tax liabilities:
Depreciable assets	(106.3		)	(108.3		)
Leases	(60.0		)	—
Other liabilities	(27.9		)	(33.4		)
Total deferred tax liabilities	(194.2		)	(141.7		)
Net deferred tax liabilities	$	(19.7	)	$	(19.0	)

Summary of Valuation Allowance

Changes in the valuation allowance for the years ended December 31, 2019, 2018 and 2017, are presented below:

	2019			2018			2017
Balance at beginning of year	$	693.5		$	735.7		$	1,189.7
Change in valuation allowance:
Included in income tax expense (benefit)	(26.2		)	(52.8		)	(62.3		)
Change in deferred assets in other comprehensive income	(7.9		)	10.6			8.5
Effect of tax rate changes	—			—			(400.2		)
Balance at end of year	$	659.4		$	693.5		$	735.7

Schedule of Components of Income Tax Expense (Benefit)

Significant components of income tax expense (benefit) are presented below:

	2019			2018			2017
Current:
Federal	$	0.2		$	(0.5	)	$	(4.5	)
State	(0.1		)	(0.3		)	0.3
Foreign	5.1			2.1			2.4
Deferred:
Federal	(0.1		)	(5.3		)	0.7
State	—			—			0.1
Foreign	2.5			(2.2		)	(0.4		)
Amount allocated to other comprehensive income	(1.4		)	—			—
Change in valuation allowance on beginning-of-the-year deferred tax assets	—			—			(0.8		)
Income tax expense (benefit)	$	6.2		$	(6.2	)	$	(2.2	)

Schedule of Effective Income Tax Rate Reconciliation

The reconciliation of income tax on income before income taxes computed at the U.S. federal statutory tax rates to actual income tax expense is presented below:

	2019			2018			2017
Income tax expense at U.S. federal statutory rate	$	14.5		$	50.0		$	57.2
Income tax expense calculated on noncontrolling interests	(10.9		)	(12.2		)	(21.5		)
State and foreign tax expense, net of federal tax	12.9			(2.3		)	6.3
Increase (decrease) in deferred tax asset valuation allowance	(26.2		)	(52.8		)	(51.8		)
Amount allocated to other comprehensive income	(1.4		)	—			—
Remeasurement of deferred taxes for U.S. tax legislation	—			—			(4.3		)
Transition tax on foreign earnings	—			—			7.9
Non-deductible compensation	4.7			8.1			—
Other permanent differences	7.3			2.3			2.4
Other differences	5.3			0.7			1.6
Income tax expense (benefit)	$	6.2		$	(6.2	)	$	(2.2	)

Schedule of Unrecognized Tax Benefits Roll Forward

A reconciliation of the change in unrecognized tax benefits for 2019, 2018 and 2017 is presented below:

	2019			2018			2017
Balance at beginning of year	$	87.2		$	89.4		$	124.2
Decreases for prior year tax positions	(12.2		)	(2.2		)	(0.5		)
Increases (decreases) for current year tax positions	0.3			—			0.3
Increases (decreases) related to tax rate changes (a)	—			—			(34.6		)
Balance at end of year	$	75.3		$	87.2		$	89.4

(a)

As a result of the Tax Act, the value of unrecognized tax benefits associated with net operating loss carryforwards and other temporary differences was reduced to reflect the lower tax rates that will apply if the uncertainties related to these deferred tax assets materialize in the future.