CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parentheticals) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Issuance of common stock under stock option and benefit plans, shares	1.6	1.5	1.4
Issuance of common stock under stock option and benefit plans, excess income tax benefit	$ 6	$ 11	$ 7
Repurchase and retirement of common stock, shares	11.8	8.3
Cash dividends declared, per share of common stock	$ 0.7525	$ 0.63	$ 0.25
Unrealized gains/loss on securities, income tax benefit/expense	1.2	0.3	1.4
Unfunded pension gains/losses, income tax benefit/expense	$ 8	$ 14	$ 8