Summary Of Information Relating To Options Outstanding And Exercisable (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding as of 12/31/2013	8.8
Weighted Average Remaining Contractual Life	6 years 2 months 12 days
Weighted Average Exercise Price	$ 39.47
Exercisable as of 12/31/2013	4.5
Weighted Average Exercise Price	$ 26.08
$5.01 - $15.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower Limit	$ 5.01
Range of Exercise Prices, Upper Limit	$ 15.00
Outstanding as of 12/31/2013	0.2
Weighted Average Remaining Contractual Life	6 months
Weighted Average Exercise Price	$ 14.82
Exercisable as of 12/31/2013	0.2
Weighted Average Exercise Price	$ 14.82
$15.01 - $25.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower Limit	$ 15.01
Range of Exercise Prices, Upper Limit	$ 25.00
Outstanding as of 12/31/2013	1.4
Weighted Average Remaining Contractual Life	2 years 7 months 6 days
Weighted Average Exercise Price	$ 20.44
Exercisable as of 12/31/2013	1.4
Weighted Average Exercise Price	$ 20.44
$25.01 - $35.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower Limit	$ 25.01
Range of Exercise Prices, Upper Limit	$ 35.00
Outstanding as of 12/31/2013	2.9
Weighted Average Remaining Contractual Life	5 years 1 month 6 days
Weighted Average Exercise Price	$ 29.40
Exercisable as of 12/31/2013	2.9
Weighted Average Exercise Price	$ 29.40
$35.01 - $45.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower Limit	$ 35.01
Range of Exercise Prices, Upper Limit	$ 45.00
Outstanding as of 12/31/2013	1.1
Weighted Average Remaining Contractual Life	7 years
Weighted Average Exercise Price	$ 40.62
Exercisable as of 12/31/2013	0
Weighted Average Exercise Price	$ 0.00
$45.01 - $55.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower Limit	$ 45.01
Range of Exercise Prices, Upper Limit	$ 55.00
Outstanding as of 12/31/2013	1.5
Weighted Average Remaining Contractual Life	8 years 3 months 18 days
Weighted Average Exercise Price	$ 53.80
Exercisable as of 12/31/2013	0
Weighted Average Exercise Price	$ 0.00
$55.01 - $67.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower Limit	$ 55.01
Range of Exercise Prices, Upper Limit	$ 67.00
Outstanding as of 12/31/2013	1.7
Weighted Average Remaining Contractual Life	9 years 4 months 24 days
Weighted Average Exercise Price	$ 61.91
Exercisable as of 12/31/2013	0
Weighted Average Exercise Price	$ 0.00