Employee Benefits (Change In Level 3 Plan Assets) (Details) (USD $) In Millions, unless otherwise specified				12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Level 3 [Member]		Dec. 31, 2013 Level 3 [Member] Real Estate [Member]		Dec. 31, 2013 Level 3 [Member] Hedge Fund Investment [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of year	$ 75	$ 75	$ 62		[1]		[1]		[1]
Purchases				9		2		7
Net unrealized gains				1				1
Fair value of plan assets at end of year	$ 75	$ 75	$ 62	$ 10	[2]	$ 2		$ 8

[1] There were no Level 3 plan assets as of December 31, 2012.

[2] See Note 15, “Fair Value of Financial Instruments,” for further discussion of fair value measurements.