Pension And Profit Sharing Plans (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Contributions percentage of employer match	5.00%
Defined contribution pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution percentage of eligible employees compensation	10.00%
Vested after two years	20.00%
Vested after three years	60.00%
Vested after four years	80.00%
Vested after five years	100.00%
Pension expense	$ 4	$ 7	$ 6
Qualified profit-sharing/401(k) [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution percentage of eligible employees compensation	25.00%
Vested after two years	20.00%
Vested after three years	60.00%
Vested after four years	80.00%
Vested after five years	100.00%
Pension expense	3	3	4
Non-qualified pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension expense	2	2	2
Non-qualified profit-sharing/401(k) [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension expense	$ 1	$ 1	$ 1