Equity (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		6 Months Ended
	Jul. 28, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Reconciliation of the Beginning and Ending Balances of the Carrying Amounts of Equity
Balance as of beginning of period				$ 21,354	$ 21,244
Net income		$ 843	$ 1,365	1,356	2,333
Dividends				(564)	(409)
Stock-based compensation expense				23	18
Tax deduction in excess of stock-based compensation expense				0	27
Transactions in connection with stock-based compensation plans:
Stock issuances				3	20
Contributions from noncontrolling interests				0	2
Distributions to noncontrolling interests				(47)	(34)
Other comprehensive income (loss)		(200)	201	(68)	(162)
Balance as of end of period		21,404	22,006	21,404	22,006
Dividend Declared [Member] | Subsequent Event [Member]
Equity (Textual)
Dividends payable, date declared	Jul. 28, 2016
Dividends payable, amount per share	$ 0.60
Dividends payable, date to be paid	Sep. 08, 2016
Dividends payable, date of record	Aug. 11, 2016
Stock-Based Compensation Plans Purchase Program [Member]
Transactions in connection with stock-based compensation plans:
Stock purchases				(43)	(105)
Common Stock Purchase Program [Member]
Transactions in connection with stock-based compensation plans:
Stock purchases				(610)	(928)
Parent [Member]
Reconciliation of the Beginning and Ending Balances of the Carrying Amounts of Equity
Balance as of beginning of period				20,527	20,677
Net income				1,309	2,315
Dividends				(564)	(409)
Stock-based compensation expense				23	18
Tax deduction in excess of stock-based compensation expense				0	27
Transactions in connection with stock-based compensation plans:
Stock issuances				3	20
Contributions from noncontrolling interests				0	0
Distributions to noncontrolling interests				0	0
Other comprehensive income (loss)				(69)	(162)
Balance as of end of period		20,576	21,453	20,576	21,453
Parent [Member] | Stock-Based Compensation Plans Purchase Program [Member]
Transactions in connection with stock-based compensation plans:
Stock purchases				(43)	(105)
Parent [Member] | Common Stock Purchase Program [Member]
Transactions in connection with stock-based compensation plans:
Stock purchases				(610)	(928)
Noncontrolling Interest [Member]
Reconciliation of the Beginning and Ending Balances of the Carrying Amounts of Equity
Balance as of beginning of period				827	567
Net income				47	18
Transactions in connection with stock-based compensation plans:
Contributions from noncontrolling interests				0	2
Distributions to noncontrolling interests				(47)	(34)
Other comprehensive income (loss)				1	0
Balance as of end of period		$ 828	$ 553	$ 828	$ 553