Earnings Per Share (EPS) And Dividends (Dividend Payments On Common Stock) (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended			0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Feb. 19, 2013 Subsequent Event [Member]
Dividend Payments on Common Stock, Per Share	$ 1.44	$ 1.42	$ 1.37
Dividend Payments on Common Stock	$ 728	$ 718	$ 693
Common stock dividends per share				$ 0.37