Restructuring Programs - Additional Information (Detail) - USD ($)			12 Months Ended					32 Months Ended		36 Months Ended
	Aug. 31, 2016	May 06, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2016		Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Capital expenditures			$ 1,224,000,000	$ 1,514,000,000	$ 1,642,000,000
Severance and Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges					73,000,000
2012-2014 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Approved restructuring program cost					925,000,000					$ 925,000,000
Restructuring and related cost, cost incurred					459,000,000					899,000,000	[1]
Restructuring charges				(4,000,000)	360,000,000					729,000,000	[1]
Cash spent			21,000,000	66,000,000
Non-cash asset write-downs			6,000,000	4,000,000
Restructuring reserve			19,000,000	47,000,000	128,000,000			$ 19,000,000		128,000,000
Implementation Costs					99,000,000					170,000,000	[1]
Restructuring and related activities, authorized amount							$ 1,500,000,000
Restructuring and related cost, cost incurred					899,000,000					899,000,000
Reversal to restructuring charges				4,000,000
2012-2014 Restructuring Program | Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Implementation Costs					99,000,000
2012-2014 Restructuring Program | Other current liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring reserve			18,000,000					18,000,000
2012-2014 Restructuring Program | Maximum | Other liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring reserve			1,000,000					1,000,000
2012-2014 Restructuring Program | Severance and Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges				(4,000,000)
Cash spent			21,000,000	66,000,000
Non-cash asset write-downs			6,000,000	4,000,000
Restructuring reserve			19,000,000	47,000,000	128,000,000			19,000,000		128,000,000
2014-2018 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Approved restructuring program cost	$ 5,700,000,000
Reallocation of previously approved capital expenditures to be spent on restructuring program cash costs	600,000,000
Restructuring and related cost, cost incurred			1,086,000,000	1,002,000,000	381,000,000			2,469,000,000	[2]
Restructuring charges			714,000,000	711,000,000	274,000,000			1,699,000,000	[2]
Cash spent			315,000,000	243,000,000
Non-cash asset write-downs			321,000,000	273,000,000
Restructuring reserve			464,000,000	395,000,000	224,000,000			464,000,000		224,000,000
Implementation Costs			372,000,000	291,000,000	107,000,000			770,000,000	[2]
2014-2018 Restructuring Program | Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Implementation Costs			372,000,000	291,000,000	107,000,000
2014-2018 Restructuring Program | Other current liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring reserve			379,000,000					379,000,000
2014-2018 Restructuring Program | Other liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring reserve			85,000,000					85,000,000
2014-2018 Restructuring Program | Maximum
Restructuring Cost and Reserve [Line Items]
Capital expenditures	1,600,000,000	$ 2,200,000,000
2014-2018 Restructuring Program | Restructuring Program Costs
Restructuring Cost and Reserve [Line Items]
Approved restructuring program cost	4,100,000,000	3,500,000,000
2014-2018 Restructuring Program | Cash Expense
Restructuring Cost and Reserve [Line Items]
Approved restructuring program cost	3,100,000,000	2,500,000,000
2014-2018 Restructuring Program | Non Cash Expense
Restructuring Cost and Reserve [Line Items]
Approved restructuring program cost	1,000,000,000	$ 1,000,000,000
2014-2018 Restructuring Program | Severance and Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges			402,000,000	442,000,000
Cash spent			315,000,000	243,000,000
Non-cash asset write-downs			9,000,000	4,000,000
Restructuring reserve			$ 464,000,000	$ 395,000,000	224,000,000			$ 464,000,000		$ 224,000,000
2014-2018 Restructuring Program | Cash Outlays
Restructuring Cost and Reserve [Line Items]
Approved restructuring program cost	$ 4,700,000,000
2014 Restructuring Charges | Severance and Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges					$ 52,000,000
2013 Restructuring Charges | Severance and Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges						$ 21,000,000

[1] Includes all charges recorded since program inception in 2012 through conclusion on December 31, 2014.

[2] Includes all charges recorded since program inception on May 6, 2014 through December 31, 2016.