Debt - Additional Information (Detail)	1 Months Ended			3 Months Ended	12 Months Ended
	Jan. 31, 2017 USD ($)	Feb. 29, 2016 GBP (£)	Jun. 30, 2015 USD ($) Contract	Dec. 31, 2016 USD ($)	Dec. 31, 2016 USD ($) Contract	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2016 GBP (£)	Nov. 30, 2016 USD ($)
Debt Instrument [Line Items]
Loss on extinguishment of debt					$ 1,000,000	$ 39,000,000	$ 0
Repayments of debt principal after year five				$ 7,457,000,000	7,457,000,000
Debt issuance costs				56,000,000	56,000,000	61,000,000
Line of credit outstanding				0	0
Commercial paper program				3,500,000,000	3,500,000,000
Debt before unamortized discount				8,650,000,000	8,650,000,000
Discount of debt amortization					3,000,000	3,000,000	$ 3,000,000
Senior Notes [Member]
Debt Instrument [Line Items]
Debt repurchased principle amount				181,000,000	181,000,000
Early repayment of senior notes				182,000,000
Debt premium									$ 500,000
Loss on extinguishment of debt				1,000,000
Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt issuance costs				56,000,000	56,000,000	61,000,000
Debt before unamortized discount				8,650,000,000	8,650,000,000	8,831,000,000
Unamortized discount				50,000,000	50,000,000	53,000,000
Maximum [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt repurchased principle amount									$ 250,000,000
Subsequent Event [Member]
Debt Instrument [Line Items]
Repayments of debt principal after year five	$ 7,400,000,000
Debt before unamortized discount	8,600,000,000
Subsequent Event [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt repurchased principle amount	69,000,000
Early repayment of senior notes	71,000,000
Debt premium	$ 1,000,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maximum potential lien on assets located in specified regions				$ 1,100,000,000	$ 1,100,000,000
Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Percentage of liens of companies consolidated asset				5.00%	5.00%			5.00%
Notes Payable, Other Payables [Member]
Debt Instrument [Line Items]
Period for borrowing funds					270 days
Commercial Paper [Member]
Debt Instrument [Line Items]
Short-term debt outstanding				$ 0	$ 0	0
2015 Credit Facility [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Letter of credit subfacility			$ 750,000,000
2015 Credit Facility [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility term			5 years
Credit facility maturity date			Jun. 30, 2020
Line of credit facility, number of extension options | Contract			2
Credit facility, extension period for maturity			1 year
Line of credit facility maximum borrowing capacity			$ 3,500,000,000.0
Line of credit facility, amount terminated			5,300,000,000
Line of credit facility, available borrowing capacity				$ 3,500,000,000	$ 3,500,000,000
Quarterly facility fees at per annum rate					0.175%
2015 Credit Facility [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Line of credit facility, commitment amount			$ 4,500,000,000.0
Debt-to-capital ratio				0.60	0.60			0.60
2015 Credit Facility [Member] | Revolving Credit Facility [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Margin percentage					0.075%
2015 Credit Facility [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Margin percentage					1.075%
2016 Credit Facility [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility term		3 years
Credit facility, extension period for maturity		1 year
Line of credit facility maximum borrowing capacity | £		£ 1,075,000,000.000
Quarterly facility fees at per annum rate					0.175%
Number of debt instrument | Contract					3
Letters of credit outstanding, amount | £								£ 147,500,000
Letter of credit facility | £		£ 900,000,000
2016 Credit Facility [Member] | Letter of Credit [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Margin percentage					0.075%
2016 Credit Facility [Member] | Letter of Credit [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Margin percentage					1.075%
Apache finance Canada 7.75% notes due 2029 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt before unamortized discount				$ 300,000,000	$ 300,000,000	$ 300,000,000