Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 662,829	$ 725,722
Accounts receivable, net	204,696	319,152
Taxes receivable	105,345	55,480
Prepaid expenses and other current assets	66,105	92,260
Total current assets	1,038,975	1,192,614
Property and equipment, at cost	12,034,331	12,364,888
Accumulated depreciation	(2,545,091)	(2,302,940)
Property and equipment, net	9,489,240	10,061,948
Other assets	266,444	185,555
Total assets	10,794,659	11,440,117
Current liabilities
Current maturities of long-term debt	249,843	299,882
Accounts payable	84,032	108,224
Accrued payroll and related costs	54,904	48,383
Taxes payable	34,391	46,561
Interest payable	98,189	61,299
Other current liabilities	71,665	68,944
Total current liabilities	593,024	633,293
Long-term debt	3,795,867	4,040,229
Deferred income taxes	164,962	2,084
Other liabilities	290,178	297,066
Total liabilities	4,844,031	4,972,672
Commitments and contingencies (Note 14)
Shareholders' equity
Common stock	2,450	2,432
Additional paid-in capital	678,922	654,168
Retained earnings	4,637,677	5,154,221
Accumulated other comprehensive loss	(42,888)	(52,140)
Total shareholders' equity	5,276,161	5,758,681
Noncontrolling interests	674,467	708,764
Total equity	5,950,628	6,467,445
Total liabilities and equity	10,794,659	11,440,117
Noble Corp
Current assets
Cash and cash equivalents	662,011	653,833
Accounts receivable, net	204,696	319,152
Taxes receivable	105,345	55,480
Prepaid expenses and other current assets	65,441	88,749
Total current assets	1,037,493	1,117,214
Property and equipment, at cost	12,034,331	12,364,888
Accumulated depreciation	(2,545,091)	(2,302,940)
Property and equipment, net	9,489,240	10,061,948
Other assets	266,528	178,552
Total assets	10,793,261	11,357,714
Current liabilities
Current maturities of long-term debt	249,843	299,882
Accounts payable	83,873	107,868
Accrued payroll and related costs	54,904	48,319
Taxes payable	33,965	46,561
Interest payable	98,189	61,299
Other current liabilities	71,466	67,312
Total current liabilities	592,240	631,241
Long-term debt	3,795,867	4,040,229
Deferred income taxes	164,962	2,084
Other liabilities	290,178	292,183
Total liabilities	4,843,247	4,965,737
Commitments and contingencies (Note 14)
Shareholders' equity
Common stock	26,125	26,125
Additional paid-in capital	623,137	594,091
Retained earnings	4,669,173	5,115,137
Accumulated other comprehensive loss	(42,888)	(52,140)
Total shareholders' equity	5,275,547	5,683,213
Noncontrolling interests	674,467	708,764
Total equity	5,950,014	6,391,977
Total liabilities and equity	$ 10,793,261	$ 11,357,714