Long-Term Debt (Details) - USD ($)				3 Months Ended	12 Months Ended
	Jan. 06, 2016	Jul. 29, 2015	Oct. 03, 2013	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Sep. 20, 2016	Aug. 27, 2015
Debt Instrument [Line Items]
Debt				$ 7,114,000,000	$ 7,114,000,000	$ 7,976,000,000
Unamortized Discount				(23,000,000)	(23,000,000)	(24,000,000)
Debt Instrument, Unamortized Premium				17,000,000	17,000,000	113,000,000
Total Debt, Net of Discount				7,074,000,000	7,074,000,000	8,029,000,000
Capital Lease Obligations, Current				(63,000,000)	(63,000,000)	(53,000,000)
Long-Term Debt Due After One Year				7,011,000,000	7,011,000,000	7,976,000,000
Debt Exchange, Percent of Outstanding Notes Tendered for Exchange		99.40%
Deferred Finance Costs, Net		$ 12,000,000
Repayments of Lines of Credit		$ 70,000,000			850,000,000	0	$ 0
Repayments of Long-term Debt [Abstract]
2014				0	0
2015				0	0
2016				1,550,000,000	1,550,000,000
2017				0	0
2018				1,379,000,000	1,379,000,000
Thereafter				3,810,000,000	3,810,000,000
Total				6,739,000,000	6,739,000,000
Gain on extinguishment					80,000,000	0	0
Repayments of Long-term Lines of Credit				850,000,000	0	70,000,000	$ 0
Term Loan Facility
Debt Instrument [Line Items]
Debt				1,400,000,000	1,400,000,000
Line of Credit
Debt Instrument [Line Items]
Debt				$ 0	$ 0	$ 0
Interest Rate				0.00%	0.00%	0.00%
Debt Instrument, Offering Date			Aug. 27, 2015
Line of Credit Facility, Maximum Borrowing Capacity			$ 4,000,000,000
Credit facility aggregate short-term loans and letters of credit, maximum			$ 500,000,000
Credit facility covenant term debt to capitalization ratio maximum			65.00%
Credit facility interest rate, Eurodollar rate plus, minimum									0.90%
Credit facility fee rate basis points, minimum									0.10%
Credit facility fee rate basis points, maximum									0.25%
Credit facility interest rate, Eurodollar rate plus, maximum									1.50%
Noble Midstream Revolving Credit Facility, due September 20, 2021
Debt Instrument [Line Items]
Debt				$ 0	$ 0	$ 0
Interest Rate				0.00%	0.00%	0.00%
Capital Lease and Other Obligations
Debt Instrument [Line Items]
Debt				$ 375,000,000	$ 375,000,000	$ 403,000,000
Interest Rate				0.00%	0.00%	0.00%
Capital Lease Obligations, Current				$ (63,000,000)	$ (63,000,000)	$ (53,000,000)
8.25% Senior Notes, due March 1, 2019
Debt Instrument [Line Items]
Debt				$ 1,000,000,000	$ 1,000,000,000	$ 1,000,000,000
Interest Rate				8.25%	8.25%	8.25%
Senior Notes, due May 1, 2021
Debt Instrument [Line Items]
Debt				$ 379,000,000	$ 379,000,000	$ 693,000,000
Interest Rate	5.625%			5.625%	5.625%	5.625%
Debt Instrument, Maturity Date	May 01, 2021
4.15% Senior Notes, due December 15, 2021
Debt Instrument [Line Items]
Debt				$ 1,000,000,000	$ 1,000,000,000	$ 1,000,000,000
Interest Rate				4.15%	4.15%	4.15%
Senior Notes, due June 1, 2022
Debt Instrument [Line Items]
Debt				$ 18,000,000	$ 18,000,000	$ 597,000,000
Interest Rate	5.875%			5.875%	5.875%	5.875%
Debt Instrument, Maturity Date	Jun. 01, 2022
7.25% Senior Notes, due October 15, 2023
Debt Instrument [Line Items]
Debt				$ 100,000,000	$ 100,000,000	$ 100,000,000
Interest Rate				7.25%	7.25%	7.25%
Unamortized Debt Issuance Expense				$ (34,000,000)	$ (34,000,000)	$ (36,000,000)
Senior Notes, due June 1, 2024
Debt Instrument [Line Items]
Debt				$ 8,000,000	$ 8,000,000	$ 499,000,000
Interest Rate	5.875%			5.875%	5.875%	5.875%
Debt Instrument, Maturity Date	Jun. 01, 2024
Senior Notes Due November 15, 2024
Debt Instrument [Line Items]
Debt				$ 650,000,000	$ 650,000,000	$ 650,000,000
Interest Rate				3.90%	3.90%	3.90%
8.00% Senior Notes, due April 1, 2027
Debt Instrument [Line Items]
Debt				$ 250,000,000	$ 250,000,000	$ 250,000,000
Interest Rate				8.00%	8.00%	8.00%
6.00% Senior Notes, due March 1, 2041
Debt Instrument [Line Items]
Debt				$ 850,000,000	$ 850,000,000	$ 850,000,000
Interest Rate				6.00%	6.00%	6.00%
5.25% Senior Notes, due November 15, 2043
Debt Instrument [Line Items]
Debt				$ 1,000,000,000	$ 1,000,000,000	$ 1,000,000,000
Interest Rate				5.25%	5.25%	5.25%
Senior Notes, due November 15, 2044
Debt Instrument [Line Items]
Debt				$ 850,000,000	$ 850,000,000	$ 850,000,000
Interest Rate				5.05%	5.05%	5.05%
7.25% Senior Debentures, due August 1, 2097
Debt Instrument [Line Items]
Debt				$ 84,000,000	$ 84,000,000	$ 84,000,000
Interest Rate				7.25%	7.25%	7.25%
Credit Facility
Debt Instrument [Line Items]
Debt				$ 550,000,000	$ 550,000,000	$ 0
Interest Rate				2.01%	2.01%	0.00%
Line of Credit | Term Loan Facility
Debt Instrument [Line Items]
Debt Instrument, Term	3 years
Repayments of Long-term Debt [Abstract]
Proceeds					$ 1,380,000,000
Line of Credit | Credit Facility
Debt Instrument [Line Items]
Credit facility fee rate basis points, minimum	0.10%
Credit facility fee rate basis points, maximum	0.75%
Federal Funds Effective Swap Rate | Line of Credit | Term Loan Facility
Repayments of Long-term Debt [Abstract]
Basis spread	0.50%
London Interbank Offered Rate (LIBOR) | Line of Credit | Term Loan Facility
Repayments of Long-term Debt [Abstract]
Basis spread	1.00%
London Interbank Offered Rate (LIBOR) | Line of Credit | Credit Facility
Debt Instrument [Line Items]
Credit facility interest rate, Eurodollar rate plus, minimum	1.00%
Credit facility interest rate, Eurodollar rate plus, maximum	1.75%
Noble Midstream Revolving Credit Facility, due September 20, 2021 | Line of Credit
Debt Instrument [Line Items]
Debt Instrument, Term					5 years
Line of Credit Facility, Maximum Borrowing Capacity								$ 350,000,000
Repayments of Long-term Debt [Abstract]
Available increase in capacity								350,000,000
Noble Midstream Revolving Credit Facility, due September 20, 2021 | Federal Funds Effective Swap Rate | Line of Credit
Repayments of Long-term Debt [Abstract]
Basis spread					0.50%
Noble Midstream Revolving Credit Facility, due September 20, 2021 | London Interbank Offered Rate (LIBOR) | Line of Credit
Repayments of Long-term Debt [Abstract]
Basis spread					1.00%
Letter of Credit | Noble Midstream Revolving Credit Facility, due September 20, 2021 | Line of Credit
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity								$ 100,000,000
Other Operating Income (Expense) | Line of Credit | Credit Facility
Repayments of Long-term Debt [Abstract]
Gain on extinguishment					$ 80,000,000