Inventories (Tables)

12 Months Ended

Dec. 31, 2015

Inventories [Abstract]

Inventory Amounts by Product Type

Our inventory amounts by product type were as follows at the dates indicated:

	December 31,
	2015		2014
NGLs	$	639.9	$	579.1
Petrochemicals and refined products		148.0		295.6
Crude oil		222.1		97.8
Natural gas		28.1		41.7
Total	$	1,038.1	$	1,014.2

Cost of Sales and Lower of Cost or Market Adjustments

The following table presents our total cost of sales amounts and lower of cost or market adjustments for the periods indicated:

	For the Year Ended December 31,
	2015			2014			2013
Cost of sales (1)		$	19,612.9		$	40,464.1		$	40,770.2
Lower of cost or market adjustments within cost of sales			19.8			22.8			18.5
(1)Cost of sales is a component of "Operating costs and expenses," as presented on our Statements of Consolidated Operations. Fluctuations in these amounts are primarily due to changes in energy commodity prices and sales volumes associated with our marketing activities.