Long-Term Incentive Employee Compensation - Rollforward of Outstanding Restricted Stock (Detail) (RSUs, PSUs and RSAs [Member], USD $) In Millions, except Per Share data, unless otherwise specified	2 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Beginning Outstanding, shares		1.2	1.4	0.9
Granted , shares	0.4	0.6	0.4	0.3
Lapsed, shares		(0.4)	(0.5)	(0.3)
Cancelled, shares		(0.1)	(0.1)	(0.6)
Outstanding, shares	1.4	1.3	1.2	1.4
Ending Outstanding, shares	1.4	1.3	1.2	1.4
Outstanding, Weighted Average Grant Date Fair Value		$ 21.06	$ 18.55	$ 89.70
Granted, Weighted Average Grant Date Fair Value	$ 20.27	$ 28.16	$ 22.56	$ 115.18
Lapsed, Weighted Average Grant Date Fair Value		$ 20.25	$ 15.21	$ 99.53
Canceled, Weighted Average Grant Date Fair Value		$ 22.68	$ 20.58	$ 95.30
Outstanding, Weighted Average Grant Date Fair Value	$ 18.55	$ 24.17	$ 21.06	$ 18.55
Outstanding, Weighted Average Grant Date Fair Value	$ 18.55	$ 24.17	$ 21.06	$ 18.55
Before Equitable Adjustment [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding, shares	0.3			0.3
Ending Outstanding, shares	0.3			0.3
Outstanding, Weighted Average Grant Date Fair Value	$ 93.42			$ 93.42
Outstanding, Weighted Average Grant Date Fair Value	$ 93.42			$ 93.42
After Equitable Adjustment [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding, shares	1.0			1.0
Ending Outstanding, shares	1.0			1.0
Outstanding, Weighted Average Grant Date Fair Value	$ 17.94			$ 17.94
Outstanding, Weighted Average Grant Date Fair Value	$ 17.94			$ 17.94