Long-Term Incentive Plans (Outstanding Stock Options) (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Options, Outstanding	3,715,406	5,963,268	6,425,073	6,650,947
Number of Options, Exercisable	1,752,311	1,751,173	2,211,878
Weighted Average Remaining Contractual Life in Years, Stock Options Outstanding	1 year 11 months 23 days
Weighted Average Remaining Contractual Life in Years, Stock Options Exercisable	1 year 3 months 29 days
Weighted Average Exercise Price, Stock Options Outstanding	$ 20.6883	$ 19.0485	$ 21.3330	$ 22.1713
Weighted Average Exercise Price, Stock Options Exercisable	$ 38.5120	$ 45.0174	$ 46.1478
Aggregate Intrinsic Value, Stock Options Outstanding	$ 20
$4.02-$36.69 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Average Exercise Price, Minimum	$ 4.02
Range of Average Exercise Price, Maximum	$ 36.69
Number of Options, Outstanding	2,653,000
Weighted Average Remaining Contractual Life in Years, Stock Options Outstanding	2 years 6 months 10 days
Weighted Average Exercise Price, Stock Options Outstanding	$ 4.4840
Aggregate Intrinsic Value, Stock Options Outstanding	20
$48.58-$70.86 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Average Exercise Price, Minimum	$ 48.58
Range of Average Exercise Price, Maximum	$ 70.86
Number of Options, Outstanding	1,062,406
Weighted Average Remaining Contractual Life in Years, Stock Options Outstanding	0 years 7 months 9 days
Weighted Average Exercise Price, Stock Options Outstanding	$ 61.1530
Aggregate Intrinsic Value, Stock Options Outstanding	0
Options Exercisable [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Options, Exercisable	1,752,311
Weighted Average Exercise Price, Stock Options Exercisable	$ 38.5120
Aggregate Intrinsic Value, Stock Options Exercisable	5
Options Exercisable [Member] | $4.02-$36.69 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Options, Exercisable	700,000
Weighted Average Remaining Contractual Life in Years, Stock Options Exercisable	2 years 4 months 24 days
Weighted Average Exercise Price, Stock Options Exercisable	$ 4.3879
Aggregate Intrinsic Value, Stock Options Exercisable	5
Options Exercisable [Member] | $48.58-$70.86 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Options, Exercisable	1,052,311
Weighted Average Remaining Contractual Life in Years, Stock Options Exercisable	0 years 7 months 9 days
Weighted Average Exercise Price, Stock Options Exercisable	$ 61.2115
Aggregate Intrinsic Value, Stock Options Exercisable	$ 0