Employee Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2015

Employee Incentive Plans [Abstract]

Compensation costs and related tax benefits table

(In millions)	2015		2014		2013
Compensation cost	$	111	$	101	$	88
Tax benefits	$	24	$	12	$	25

Status of, and changes in, common stock options

(Options in thousands)	2015				2014				2013
			Weighted				Weighted				Weighted
			Average				Average				Average
	Options		Exercise Price		Options		Exercise Price		Options		Exercise Price
Outstanding - January 1		7,331	$	51.84		7,350	$	42.24		8,951	$	36.29
Granted		1,410	$	120.94		2,012	$	78.11		1,890	$	58.84
Exercised		(2,146)	$	43.63		(1,869)	$	41.29		(3,107)	$	34.99
Expired or canceled		(162)	$	86.04		(162)	$	64.27		(384)	$	43.86
Outstanding - December 31		6,433	$	68.86		7,331	$	51.84		7,350	$	42.24
Options exercisable at year-end		3,414	$	46.55		3,919	$	38.11		4,217	$	35.84

Information for stock options exercised

(In millions)	2015		2014		2013
Intrinsic value of options exercised	$	179	$	84	$	105
Cash received for options exercised	$	94	$	76	$	109
Excess tax benefits realized from options exercised	$	33	$	19	$	23

Information for outstanding common stock options

		Options		Options
		Outstanding		Exercisable
Number (in thousands)		6,433		3,414
Total intrinsic value (in millions)	$	498	$	341
Weighted average exercise price	$	68.86	$	46.55
Weighted average remaining contractual life		6.8		5.4

Assumptions for fair value of options granted

	2015	2014	2013
Dividend yield	0.0%	0.1%	0.1%
Expected volatility	35.0%	35.0%	40.0%
Risk-free interest rate	1.3%	1.3%	0.7%
Expected option life	4.3 years	4.3 years	4.5 years

Status of, and changes in, restricted stock grants

(Awards in thousands)	2015			2014			2013
		Weighted			Weighted			Weighted
		Average Fair Value			Average Fair Value			Average Fair Value
	Grants/Units	at Award Date		Grants/Units	at Award Date		Grants/Units	at Award Date
Outstanding - January 1	2,121	$	53.59	2,844	$	41.56	4,064	$	35.00
Awarded	352	$	121.93	454	$	78.99	525	$	59.36
Vested	(736)	$	41.99	(1,065)	$	32.34	(1,480)	$	30.24
Forfeited	(95)	$	68.31	(112)	$	52.95	(265)	$	39.46
Outstanding - December 31	1,642	$	72.58	2,121	$	53.59	2,844	$	41.56

Status Of Changes In Strategic Performance Shares Table [Text Block]

(Awards in thousands)	2015			2014			2013
		Weighted			Weighted			Weighted
	Grants/	Average Fair Value		Grants/	Average Fair Value		Grants/	Average Fair Value
	Units	at Award Date		Units	at Award Date		Units	at Award Date
Outstanding - January 1	1,547	$	59.20	1,572	$	49.67	1,600	$	41.92
Awarded	311	$	121.78	450	$	78.50	616	$	59.84
Vested	(608)	$	45.51	(397)	$	43.53	(448)	$	36.88
Forfeited	(62)	$	76.33	(78)	$	58.41	(196)	$	47.52
Outstanding - December 31	1,188	$	81.68	1,547	$	59.20	1,572	$	49.67