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Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
CURRENT ASSETS
Cash and cash equivalents	$ 196.0	$ 445.4
Short-term investments	434.0	440.0
Accounts receivable, net	348.5	345.4
Other current assets	404.0	381.2
Total current assets	1,382.5	1,612.0
PROPERTY AND EQUIPMENT, AT COST	15,544.4	15,332.1
Less accumulated depreciation	2,812.8	2,458.4
Property and equipment, net	12,731.6	12,873.7
OTHER ASSETS	104.5	140.2
TOTAL ASSETS	14,218.6	14,625.9
CURRENT LIABILITIES
Accounts payable - trade	225.8	432.6
Accrued liabilities and other	310.0	325.9
Total current liabilities	535.8	758.5
LONG-TERM DEBT	5,002.6	4,750.7
OTHER LIABILITIES	390.0	386.7
COMMITMENTS AND CONTINGENCIES
ENSCO SHAREHOLDERS' EQUITY
Additional paid-in capital	7,216.6	7,195.0
Retained earnings	1,082.5	1,532.7
Accumulated other comprehensive income	19.2	28.6
Treasury shares, at cost	(72.1)	(69.0)
Total Ensco shareholders' equity	8,292.4	8,732.1
NONCONTROLLING INTERESTS	(2.2)	(2.1)
Total equity	8,290.2	8,730.0
Total liabilities and shareholders' equity	14,218.6	14,625.9
Class A ordinary shares, U.S.
ENSCO SHAREHOLDERS' EQUITY
Common shares, value	46.1	44.7
Common Class B, Par Value In GBP [Member]
ENSCO SHAREHOLDERS' EQUITY
Common shares, value	$ 0.1	$ 0.1

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