Note 8: Balance Sheet Information

Certain significant amounts included in the Company's Consolidated Balance Sheets consist of the following (in millions):



	As of
	December 31, 2018			December 31, 2017
Inventories:
Raw materials	$	137.3		$	117.7
Work in process	760.7			660.8
Finished goods	327.2			311.0
	$	1,225.2		$	1,089.5
Property, plant and equipment, net:
Land	$	125.5		$	148.4
Buildings	820.4			744.0
Machinery and equipment	3,980.2			3,454.6
Property, plant and equipment, gross	4,926.1			4,347.0
Less: Accumulated depreciation	(2,376.5		)	(2,067.9		)
	$	2,549.6		$	2,279.1
Accrued expenses:
Accrued payroll and related benefits	$	240.8		$	201.8
Sales related reserves	294.8			280.0
Income taxes payable	38.2			29.9
Other	85.3			101.1
	$	659.1		$	612.8

Assets classified as held-for-sale, consisting primarily of properties, are required to be recorded at the lower of carrying value or fair value less any costs to sell. The carrying value of these assets as of December 31, 2018 and 2017 was $1.4 million and $5.3 million, respectively, and is reported as other current assets on the Company’s Consolidated Balance Sheet. The Company sold the assets held-for-sale at December 31, 2017 in January 2018 for $5.5 million.

Depreciation expense for property, plant and equipment, including amortization of capital leases, totaled $359.3 million, $325.2 million and $239.6 million for 2018, 2017 and 2016, respectively.

As of December 31, 2018 and 2017, total property, plant and equipment included $0.9 million and $4.2 million, respectively, of assets financed under capital leases. Accumulated depreciation associated with these assets is included in total accumulated depreciation in the table above.

Warranty Reserves

The activity related to the Company's warranty reserves are as follows (in millions):



Balance as of December 31, 2015	$	5.3
Provision	6.3
Usage	(10.8		)
Warranty reserves from acquired businesses	8.0
Balance as of December 31, 2016	$	8.8
Provision	6.8
Usage	(7.6		)
Balance as of December 31, 2017	8.0
Provision	0.4
Usage	(3.2		)
Balance as of December 31, 2018	$	5.2