Income Taxes (Change In Unrecognized Tax Benefits ("UTB") And Related Interest And Penalties To Income Tax) (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Disclosure Income Taxes Change In Unrecognized Tax Benefits U T B And Related Interest And Penalties To Income Tax [Abstract]
Unrecognized tax benefit, Beginning balance	$ 65
The gross amount of the increase/(decrease) in the UTB as a result of tax positions taken: During a prior year	0
The gross amount of the increase/(decrease) in the UTB as a result of tax positions taken: During the current year	16
The amounts of decreases in the UTB related to settlements with taxing authorities	0
The reduction in the UTB as a result of the applicable statute of limitations	0
Unrecognized tax benefit, Ending balance	$ 81