

	Years Ended December 31,
	2019			2018			2017
Current
United States:
Federal	$	31.3		$	10.9		$	330.8
State and local	48.7			13.6			32.8
International, including Puerto Rico	29.1			35.9			60.6
Current income tax expense	$	109.1		$	60.4		$	424.2
Deferred
United States:
Federal	$	28.3		$	(16.1	)	$	39.3
State and local	(18.3		)	(22.4		)	(3.8		)
International, including Puerto Rico	0.5			17.3			(8.4		)
Deferred income tax expense (benefit)	10.5			(21.2		)	27.1
Total income tax provision	$	119.6		$	39.2		$	451.3



	December 31,
	2019			2018
Deferred tax assets
Compensation and benefits	$	91.6		$	71.4
Benefits from uncertain tax positions	22.5			22.2
Net tax credit carryforwards	108.4			94.4
Net operating loss carryforwards	57.6			42.1
Accrued liabilities	6.1			57.9
Inventories	12.9			7.2
State income taxes	0.5			0.6
Investments	1.5			1.6
Lease liability obligations	18.4			—
Other	1.9			4.1
Total deferred tax assets	321.4			301.5
Deferred tax liabilities
Property, plant, and equipment	(22.6		)	(24.5		)
Cash flow and net investment hedges	(6.8		)	(4.5		)
Deferred tax on foreign earnings	(0.1		)	(0.6		)
Right-of-use assets	(17.5		)	—
Inventories	—			(3.9		)
Other intangible assets	(71.0		)	(77.1		)
Other	(2.2		)	(0.1		)
Total deferred tax liabilities	(120.2		)	(110.7		)
Valuation allowance	(65.8		)	(46.7		)
Net deferred tax assets	$	135.4		$	144.1

The valuation allowance of $65.8 million as of December 31, 2019 reduces certain deferred tax assets to amounts that are more likely than not to be realized. This allowance primarily relates to the net operating loss carryforwards of certain non-United States subsidiaries and certain non-United States credit carryforwards.



	Carryforward Amount		Tax Benefit Amount		Valuation Allowance			Net Tax Benefit		Carryforward Period Ends
United States federal net operating losses	$	35.9	$	7.5	$	—		$	7.5	2030-2037
United States federal net operating losses	11.3		2.4		—			2.4		Indefinite
United States state net operating losses	32.1		2.1		(2.1		)	—		2026-2039
United States state net operating losses	1.0		—		—			—		Indefinite
Non-United States net operating losses	52.4		4.7		(4.1		)	0.6		2020-2027
Non-United States net operating losses	239.1		40.7		(35.2		)	5.5		Indefinite
United States capital losses	34.1		0.5		(0.5		)	—		2022
Total	$	405.9	$	57.9	$	(41.9	)	$	16.0

Certain tax attributes are subject to an annual limitation as a result of the acquisitions of Harpoon Medical, Inc. and CAS Medical Systems, Inc. (see Note 8), which constitute a change of ownership as defined under Internal Revenue Code Section 382.



	Carryforward Amount		Valuation Allowance			Net Tax Benefit		Carryforward Period Ends
California research expenditure tax credits	$	124.4	$	—		$	124.4	Indefinite
Federal research expenditure tax credits	1.5		—			1.5		2026-2039
Puerto Rico purchases credit	21.8		(21.8		)	—		Indefinite
Total	$	147.7	$	(21.8	)	$	125.9

The Company has $124.4 million of California research expenditure tax credits it expects to use in future periods. The credits may be carried forward indefinitely. Based upon anticipated future taxable income, the Company expects that it is more likely than not that all California research expenditure tax credits will be utilized, although the utilization of the full benefit is expected to occur over a number of years and into the distant future. Accordingly, no valuation allowance has been provided. The Company has $21.8 million of Puerto Rico purchases credit. Throughout its history and into the future, the Puerto Rico operations generate or are expected to generate credits each year in excess of its ability to utilize credits in those years. As a result, even though the credits have an indefinite life, the Company continues to record a valuation allowance on the credit carryforwards.

On December 22, 2017, Public Law 115-97, commonly referred to as the Tax Cuts and Jobs Act (the "2017 Act"), was signed into law. The 2017 Act (1) reduced the U.S. federal corporate tax rate from 35 percent to 21 percent for tax years beginning after December 31, 2017, (2) required companies to pay a one-time mandatory deemed repatriation tax on the cumulative earnings of certain foreign subsidiaries that were previously tax deferred, and (3) created new taxes on certain foreign earnings in future years.

On December 22, 2017, Staff Accounting Bulletin No. 118 ("SAB 118") was issued to address the application of generally accepted accounting principles in the United States of America in situations when a registrant does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the 2017 Act. In accordance with SAB 118, as of December 31, 2017, the Company had estimated provisional amounts for (1) $3.3 million of tax benefits in connection with the remeasurement of certain tax assets and liabilities, (2) $297.4 million of net tax expense (discussed below) in connection with the one-time mandatory deemed repatriation tax on cumulative earnings of certain foreign subsidiaries, and (3) $32.3 million of tax benefits associated with a tax reform related restructuring. In accordance with SAB 118, during 2018 the Company adjusted the provisional amounts as described below.

As a result of Internal Revenue Service ("IRS") guidance issued subsequent to the 2017 Act, the $32.3 million of tax benefits associated with the tax reform related restructuring mentioned above were reversed in 2018. In addition, during 2018, the Company recorded a $12.8 million reduction in the repatriation tax and an additional benefit of $3.7 million in connection with the remeasurement of deferred tax assets. In accordance with SAB 118, the Company completed its accounting for the 2017 Act during the fourth quarter of 2018. In addition, the Company elected to pay the repatriation tax in installments over eight years.

The Company asserts that $1.1 billion of its foreign earnings continue to be indefinitely reinvested and it intends to repatriate $140.7 million of its foreign earnings as of December 31, 2019. The estimated net tax liability (after credits) on the indefinitely reinvested earnings if repatriated is $13.6 million.

The Company has received tax incentives in certain non-U.S. tax jurisdictions, the primary benefit for which will expire in 2029. The tax reductions as compared to the local statutory rates were $157.6 million ($0.75 per diluted share), $144.9 million ($0.70 per diluted share), and $81.0 million ($0.39 per diluted share) for the years ended December 31, 2019, 2018, and 2017, respectively.



	Years Ended December 31,
	2019			2018			2017
Income tax expense at U.S. federal statutory rate	$	245.0		$	159.9		$	362.2
Foreign income taxed at different rates	(75.0		)	(16.2		)	(106.9		)
State and local taxes, net of federal tax benefit	11.9			6.8			11.5
Tax credits, federal and state	(42.9		)	(36.7		)	(25.8		)
Build (release) of reserve for prior years' uncertain tax positions	5.0			(35.5		)	(7.7		)
U.S. tax on foreign earnings, net of credits	(2.9		)	(12.2		)	(30.3		)
Tax on global intangible low-taxed income	32.0			—			—
Foreign-derived intangible income deduction	(7.2		)	(6.6		)	—
Deductible employee share-based compensation	(57.6		)	(41.8		)	(48.2		)
Nondeductible employee share-based compensation	3.2			2.8			3.9
Impact related to 2017 U.S. Tax Reform	2.8			15.8			294.1
Other	5.3			2.9			(1.5		)
Income tax provision	$	119.6		$	39.2		$	451.3

As of December 31, 2019 and 2018, the gross uncertain tax positions were $203.1 million and $150.7 million, respectively. The Company estimates that these liabilities would be reduced by $50.1 million and $42.7 million, respectively, from offsetting tax benefits associated with the correlative effects of potential transfer pricing adjustments, state income taxes, and timing adjustments. The net amounts of $153.0 million and $108.0 million, respectively, if not required, would favorably affect the Company's effective tax rate.



	December 31,
	2019			2018			2017
Uncertain gross tax positions, January 1	$	150.7		$	225.6		$	245.5
Current year tax positions	55.4			37.8			77.7
Increase in prior year tax positions	0.8			13.9			63.7
Decrease in prior year tax positions	(3.8		)	(78.8		)	(65.0		)
Settlements	—			(46.5		)	(95.3		)
Lapse of statutes of limitations	—			(1.3		)	(1.0		)
Uncertain gross tax positions, December 31	$	203.1		$	150.7		$	225.6

The table above summarizes the gross amounts of uncertain tax positions without regard to reduction in tax liabilities or additions to deferred tax assets and liabilities if such uncertain tax positions were settled.

The Company recognizes interest and penalties, if any, related to uncertain tax positions in the provision for income taxes. As of December 31, 2019, the Company had accrued $9.3 million (net of $3.5 million tax benefit) of interest related to uncertain tax positions, and as of December 31, 2018, the Company had accrued $4.6 million (net of $1.9 million tax benefit) of interest related to uncertain tax positions. During 2019, 2018, and 2017, the Company recognized interest expense (benefit), net of tax benefit, of $4.7 million, $(2.8) million, and $(7.3) million, respectively, in "Provision for Income Taxes" on the consolidated statements of operations.

The Company strives to resolve open matters with each tax authority at the examination level and could reach agreement with a tax authority at any time. While the Company has accrued for matters it believes are more likely than not to require settlement, the final outcome with a tax authority may result in a tax liability that is more or less than that reflected in the consolidated financial statements. Furthermore, the Company may later decide to challenge any assessments, if made, and may exercise its right to appeal. The uncertain tax positions are reviewed quarterly and adjusted as events occur that affect potential liabilities for additional taxes, such as lapsing of applicable statutes of limitations, proposed assessments by tax authorities, negotiations between tax authorities, identification of new issues, and issuance of new legislation, regulations, or case law. Management believes that adequate amounts of tax and related penalty and interest have been provided in income tax expense for any adjustments that may result from these uncertain tax positions.

At December 31, 2019, all material state, local, and foreign income tax matters have been concluded for years through 2008. During 2018, the Company signed agreements with the IRS to settle tax years 2009 through 2014, including transfer pricing matters and the tax treatment of a portion of a litigation settlement payment received in 2014. The IRS began its examination of the 2015 and 2016 tax years during the fourth quarter of 2018 and its examination of the 2017 tax year during the first quarter of 2019.

During 2018, the Company executed an Advance Pricing Agreement ("APA") between the United States and Switzerland governments for tax years 2009 through 2020 covering various transfer pricing matters . Certain intercompany transactions covering tax years 2015 through 2019 were not resolved and those related tax positions remain uncertain. These transfer pricing matters may be significant to the Company's consolidated financial statements. Based upon the information currently available and numerous possible outcomes, the Company cannot reasonably estimate what, if any, changes in its existing uncertain tax positions may occur in the next 12 months and, therefore, has recorded the gross uncertain tax positions as a long-term liability.

In addition, the Company executed other APAs as follows: during 2017, an APA between the United States and Japan covering tax years 2015 through 2019; and during 2018, APAs between Japan and Singapore and between Switzerland and Japan covering tax years 2015 through 2019. The Company is evaluating filing to renew some or all of these APAs for the years 2020 and forward. The execution of some or all of these APAs depends on a number of variables outside of the Company's control.