PROPERTY AND EQUIPMENT

Property and equipment as of December 31, 2014 and 2013 consisted of the following (in millions):



	2014		2013
Drilling rigs and equipment	$	13,253.2	$	15,839.0
Other	135.0		101.0
Work in progress	1,587.3		1,558.5
	$	14,975.5	$	17,498.5

During 2014, drilling rigs and equipment declined $2.6 billion primarily due to a loss on impairment of $2.5 billion, depreciation expense of $537.9 million and $152.4 million classified as "held for sale" included in other current assets on our December 31, 2014 consolidated balance sheet. These declines were partially offset by ENSCO 120, ENSCO 121 and ENSCO 122, which were placed into service during 2014 and capital upgrades to the existing rig fleet.

Work in progress as of December 31, 2014 primarily consisted of $820.1 million related to the construction of ENSCO DS-8, ENSCO DS-9 and ENSCO DS-10 ultra-deepwater drillships, $233.1 million related to a capital enhancement project on ENSCO 5006, $179.3 million related to the construction of ENSCO 110, ENSCO 140 and ENSCO 141 premium jackup rigs, $59.2 million related to the construction of ENSCO 123 ultra-premium harsh environment jackup rig and costs associated with various modification and enhancement projects.

Work in progress as of December 31, 2013 primarily consisted of $627.2 million related to the construction of ENSCO 120 Series ultra-premium harsh environment jackup rigs, $513.4 million related to the construction of ENSCO DS-8, ENSCO DS-9 and ENSCO D-S 10 ultra-deepwater drillships, $43.7 million related to the construction of ENSCO 110 premium jackup rig and costs associated with various modification and enhancement projects.

Impairment of Long-Lived Assets

During 2014, we recorded a pre-tax, non cash loss on impairment of long-lived assets of $2,463.1 million, of which $1,220.8 million was included in (loss) income from continuing operations and $1,242.3 million was included in (loss) income from discontinued operations, net in our consolidated statement of operations. These losses were recorded during the second and fourth quarters.

During the second quarter, demand for floaters deteriorated as a result of continued reductions in capital spending by operators in addition to delays in operators’ drilling programs. The reduction in demand, combined with the increasing supply from newbuild floater deliveries, led to a very competitive market. In general, contracting activity declined significantly, and day rates and utilization came under pressure, especially for older, less capable floaters.

In response to the adverse change in the floaters business climate, management evaluated our older, less capable floaters and committed to a plan to sell five rigs. ENSCO 5000, ENSCO 5001, ENSCO 5002, ENSCO 6000 and ENSCO 7500 were removed from our portfolio of rigs marketed for contract drilling services and actively marketed for sale. These rigs were written down to fair value, less costs to sell. We completed the sale of ENSCO 5000 in December 2014. The remaining four floaters were classified as "held for sale" on our December 31, 2014 consolidated balance sheet.

We measured the fair value of the "held for sale" rigs by applying a market approach, which was based on unobservable third-party estimated prices that would be received in exchange for the assets in an orderly transaction between market participants. We recorded a pre-tax, non-cash loss on impairment totaling $546.4 million during the second quarter associated with our "held for sale" rigs. The impairment charge was included in (loss) income from discontinued operations, net in our consolidated statement of operations for the year ended December 31, 2014.

During the fourth quarter, Brent crude oil prices declined from approximately $95 per barrel to near $55 per barrel on December 31, 2014. These declines resulted in further reductions in capital spending by operators, including the cancellation or deferral of planned drilling programs. As a result, day rates and utilization came under further pressure, especially for older, less capable rigs. The significant supply and demand imbalance will continue to be adversely impacted by future newbuild deliveries, program delays and lower capital spending by operators.

In response to the adverse change in business climate, management evaluated our aged rigs and committed to a plan to sell one additional floater and two jackups. ENSCO DS-2, ENSCO 58 and ENSCO 90 were removed from our portfolio of rigs marketed for contract drilling services. These rigs were written down to fair value, less costs to sell, during the fourth quarter and classified as "held for sale" on our December 31, 2014 consolidated balance sheet.

As of December 31, 2014, we measured the fair value of our seven "held for sale" rigs by applying a market approach, which was based on unobservable third-party estimated prices that would be received in exchange for the assets in an orderly transaction between market participants. In addition to the asset impairment recorded during the second quarter, we recorded an additional pre-tax, non-cash loss on impairment totaling $407.9 million during the fourth quarter. The impairment charge was included in (loss) income from discontinued operations, net in our consolidated statement of operations for the year ended December 31, 2014. See "Note 10 - Discontinued Operations" for additional information on our "held for sale" rigs.

On a quarterly basis, we evaluate the carrying value of our property and equipment to identify events or changes in circumstances ("triggering events") that indicate the carrying value may not be recoverable. During the second quarter, as a result of the adverse change in the floater business climate, management's decision to sell five floaters and the impairment charge incurred on the "held for sale" floaters, management concluded that a triggering event had occurred and performed an asset impairment analysis on our remaining older, less capable floaters.

Based on the analysis performed as of May 31, 2014, we recorded an additional pre-tax, non-cash loss on impairment with respect to four other floaters totaling $991.5 million, of which $288.0 million related to ENSCO DS-2 which was removed from our portfolio of rigs marketed for contract drilling services during the fourth quarter. The ENSCO DS-2 impairment charge was reclassified to (loss) income from discontinued operations, net in our consolidated statement of operations for the year ended December 31, 2014. The remaining $703.5 million impairment charge was included in loss on impairment in our consolidated statement of operations for the year ended December 31, 2014. We measured the fair value of these rigs by applying an income approach, using projected discounted cash flows. These valuations were based on unobservable inputs that require significant judgments for which there is limited information, including assumptions regarding future day rates, utilization, operating costs and capital requirements.

During the fourth quarter, as a result of the decline in commodity prices and adverse changes in the offshore drilling market, management's decision to sell an additional floater and two jackups and the impairment charge incurred on the "held for sale" rigs, management concluded that a triggering event had occurred and performed an asset impairment analysis for all floaters and jackups.

Based on the analysis performed as of December 31, 2014, we recorded an additional pre-tax, non-cash loss on impairment with respect to two older, less capable floaters and ten older, less capable jackups totaling $517.3 million. The impairment charge was included in loss on impairment in our consolidated statement of operations for the year ended December 31, 2014. We measured the fair value of these rigs by applying either an income approach, using projected discounted cash flows, or a market approach. These valuations were based on unobservable inputs that require significant judgments for which there is limited information, including assumptions regarding future day rates, utilization, operating costs and capital requirements.