Consolidated Statements of Shareholders' Equity (USD $) In Millions	Total	Common Stock	Additional Paid in Capital	Accumulated Other Comprehensive Loss	Treasury Stock at Cost	Retained Earnings
Shareholders Equity, Beginning Balance at Dec. 31, 2009	$ 6,157	$ 645	$ 2,260	$ (75)	$ (615)	$ 3,942
Net Income	725	0	0	0	0	725
Stock-based Compensation Expense	54	0	54	0	0	0
Exercise of Stock Options	47	5	42	0	0	0
Tax Benefits Related to Exercise of Stock Options	25	0	25	0	0	0
Cash Dividends	(127)	0	0	0	0	(127)
Purchase of Treasury Stock	(13)	0	0	0	(13)	0
Rabbi Trust Shares Sold	9	0	5	0	4	0
Realized Amounts Reclassified Into Earnings	12	0	0	12	0	0
Unrealized Change in Fair Value	(41)	0	0	(41)	0	0
Net Change in Other	0	1	(1)	0	0	0
Shareholders Equity, Ending Balance at Dec. 31, 2010	6,848	651	2,385	(104)	(624)	4,540
Net Income	453	0	0	0	0	453
Stock-based Compensation Expense	58	0	58	0	0	0
Exercise of Stock Options	38	3	35	0	0	0
Tax Benefits Related to Exercise of Stock Options	15	0	15	0	0	0
Cash Dividends	(143)	0	0	0	0	(143)
Purchase of Treasury Stock	(17)	0	0	0	(17)	0
Rabbi Trust Shares Sold	9	0	6	0	3	0
Unrealized Change in Fair Value	15	0	0	15	0	0
Net Change in Other	(11)	2	(2)	(11)	0	0
Shareholders Equity, Ending Balance at Dec. 31, 2011	7,265	656	2,497	(100)	(638)	4,850
Net Income	1,027	0	0	0	0	1,027
Stock-based Compensation Expense	65	0	65	0	0	0
Exercise of Stock Options	56	2	54	0	0	0
Tax Benefits Related to Exercise of Stock Options	25	0	25	0	0	0
Cash Dividends	(164)	0	0	0	0	(164)
Purchase of Treasury Stock	(13)	0	0	0	(13)	0
Rabbi Trust Shares Sold	10	0	7	0	3	0
Change in Par Value	0	(656)	656	0	0	0
Net Change in Other	(13)	0	0	(13)	0	0
Shareholders Equity, Ending Balance at Dec. 31, 2012	$ 8,258	$ 2	$ 3,304	$ (113)	$ (648)	$ 5,713