Equity (Details) - USD ($)		3 Months Ended		9 Months Ended
	Oct. 28, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reconciliation of the Beginning and Ending Balances of the Carrying Amounts of Equity
Balance as of beginning of period				$ 21,244,000,000	$ 19,946,000,000
Net income		$ 1,373,000,000	$ 1,062,000,000	3,706,000,000	2,491,000,000
Dividends				(608,000,000)	(411,000,000)
Stock-based compensation expense				27,000,000	30,000,000
Tax deduction in excess of stock-based compensation expense				33,000,000	33,000,000
Transactions in connection with stock-based compensation plans:
Stock issuances				29,000,000	37,000,000
Contributions from noncontrolling interests				5,000,000	14,000,000
Distributions to noncontrolling interests				(39,000,000)	(8,000,000)
Other comprehensive loss		(266,000,000)	(277,000,000)	(428,000,000)	(201,000,000)
Balance as of end of period		21,868,000,000	21,062,000,000	21,868,000,000	21,062,000,000
Subsequent Event [Member] | Dividend Declared [Member]
Equity (Textual)
Dividends payable, date declared	Oct. 28, 2015
Dividends payable, amount per share	$ 0.50
Dividends payable, date to be paid	Dec. 17, 2015
Dividends payable, date of record	Nov. 23, 2015
Stock-Based Compensation Plans Repurchase Program [Member]
Transactions in connection with stock-based compensation plans:
Stock purchases				(136,000,000)	(177,000,000)
Common Stock Repurchase Program [Member]
Transactions in connection with stock-based compensation plans:
Stock purchases				(1,965,000,000)	(692,000,000)
$2.5 Billion Program Approved July 2015 [Member]
Equity (Textual)
Authorized amount under stock purchase program		2,500,000,000.0		2,500,000,000.0
Parent [Member]
Reconciliation of the Beginning and Ending Balances of the Carrying Amounts of Equity
Balance as of beginning of period				20,677,000,000	19,460,000,000
Net income				3,692,000,000	2,475,000,000
Dividends				(608,000,000)	(411,000,000)
Stock-based compensation expense				27,000,000	30,000,000
Tax deduction in excess of stock-based compensation expense				33,000,000	33,000,000
Transactions in connection with stock-based compensation plans:
Stock issuances				29,000,000	37,000,000
Contributions from noncontrolling interests				0	0
Distributions to noncontrolling interests				0	0
Other comprehensive loss				(428,000,000)	(201,000,000)
Balance as of end of period		21,321,000,000	20,554,000,000	21,321,000,000	20,554,000,000
Parent [Member] | Stock-Based Compensation Plans Repurchase Program [Member]
Transactions in connection with stock-based compensation plans:
Stock purchases				(136,000,000)	(177,000,000)
Parent [Member] | Common Stock Repurchase Program [Member]
Transactions in connection with stock-based compensation plans:
Stock purchases				(1,965,000,000)	(692,000,000)
Noncontrolling Interest [Member]
Reconciliation of the Beginning and Ending Balances of the Carrying Amounts of Equity
Balance as of beginning of period				567,000,000	486,000,000
Net income				14,000,000	16,000,000
Transactions in connection with stock-based compensation plans:
Contributions from noncontrolling interests				5,000,000	14,000,000
Distributions to noncontrolling interests				(39,000,000)	(8,000,000)
Other comprehensive loss				0	0
Balance as of end of period		$ 547,000,000	$ 508,000,000	$ 547,000,000	$ 508,000,000