PROPERTY, PLANT AND EQUIPMENT

12 Months Ended

Dec. 31, 2016

Property, Plant and Equipment [Abstract]

PROPERTY, PLANT AND EQUIPMENT

PROPERTY, PLANT AND EQUIPMENT

		December 31,
	Useful Lives	2016			2015
		($ in millions)
Land and improvements to land	10-20 Years	$	281.2		$	280.4
Buildings and building equipment	10-30 Years	375.0			380.4
Machinery and equipment	3-15 Years	4,765.9			4,665.8
Leasehold improvements		3.4			2.7
Construction in progress		171.0			123.5
Property, plant and equipment		5,596.5			5,452.8
Accumulated depreciation		(1,891.6		)	(1,499.4		)
Property, plant and equipment, net		$	3,704.9		$	3,953.4

In conjunction with the Acquisition, we obtained property, plant and equipment with a fair value of $3,079.1 million as of October 5, 2015.

The weighted-average useful life of machinery and equipment at December 31, 2016 was 12 years. Depreciation expense was $435.7 million, $198.1 million and $124.5 million for 2016, 2015 and 2014, respectively.  Interest capitalized was $1.9 million, $1.1 million and $0.2 million for 2016, 2015 and 2014, respectively.  Maintenance and repairs charged to operations amounted to $236.4 million, $158.5 million and $125.0 million in 2016, 2015 and 2014, respectively.

The consolidated statements of cash flows for the years ended December 31, 2016, 2015 and 2014, included decreases of $29.9 million, $7.4 million and $0.5 million, respectively, to capital expenditures, with the corresponding change to accounts payable and accrued liabilities, related to purchases of property, plant and equipment included in accounts payable at December 31, 2016, 2015 and 2014.

During 2016, we entered into sale/leaseback transactions for railcars that we acquired in connection with the Acquisition. We received proceeds from the sales of $40.4 million for the year ended December 31, 2016.

During 2015, assets of $1.4 million were acquired under capital leases and are included in machinery and equipment as of December 31, 2015.