Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Millions	Total		Common Stock	Additional Paid-In Capital	Unearned Compensation	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
Beginning balance at Dec. 31, 2013			$ 1,466	$ 1,004	$ (33)	$ (15,633)	$ 17,952	$ (2,451)	$ 231
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 2,339						2,180		159
Other comprehensive income (loss), net of tax	(1,060)							(1,056)	(4)
Dividends							(1,300)		(146)
Stock-based compensation expense				131
Shares issued for stock options				100		225
Shares issued for restricted stock awards				(77)		77
Treasury stock acquired						(1,530)
Other				78	13	(1)
Ending balance at Dec. 31, 2014			1,466	1,236	(20)	(16,862)	18,832	(3,507)	240
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,548						1,384		164
Other comprehensive income (loss), net of tax	(454)							(443)	(11)
Dividends							(1,355)		(138)
Stock-based compensation expense				125
Shares issued for stock options				90		243
Shares issued for restricted stock awards				(69)		69
Treasury stock acquired						(1,551)
Other				56	8	(1)
Ending balance at Dec. 31, 2015	(44)	[1]	1,466	1,438	(12)	(18,102)	18,861	(3,950)	255
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,586						2,441		145
Other comprehensive income (loss), net of tax	(242)							(230)	(12)
Dividends							(1,380)		(128)
Stock-based compensation expense				123
Shares issued for stock options				128		242
Shares issued for restricted stock awards				(60)		60
Treasury stock acquired						(1,335)
Other				62	5
Ending balance at Dec. 31, 2016	$ 17		$ 1,466	$ 1,691	$ (7)	$ (19,135)	$ 19,922	$ (4,180)	$ 260

[1] Prior year amounts have been reclassified to conform to the current year presentation of debt issuance costs required by Accounting Standards Update (“ASU”) No. 2015-03 “Simplifying the Presentation of Debt Issuance Costs.” See Note 2, Summary of Significant Accounting Policies to the Consolidated Financial Statements for additional information.