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Subsequent Events - Additional Information (Detail) (USD $)
Share data in Millions, except Per Share data, unless otherwise specified |
0 Months Ended | 1 Months Ended | 3 Months Ended | 12 Months Ended | 0 Months Ended | 3 Months Ended | 1 Months Ended | 3 Months Ended | 1 Months Ended | 3 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Jul. 30, 2012
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May 03, 2010
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Apr. 30, 2009
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Feb. 28, 2014
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Mar. 31, 2012
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Jun. 30, 2011
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Sep. 30, 2010
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Jun. 30, 2010
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Feb. 03, 2014
Subsequent Event [Member]
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Feb. 18, 2013
Subsequent Event [Member]
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Mar. 31, 2014
Subsequent Event [Member]
Prepaid Forward Share Repurchase Transactions [Member]
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Feb. 28, 2014
Subsequent Event [Member]
Credit Facility [Member]
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Mar. 31, 2014
Subsequent Event [Member]
Capped Call Transactions [Member]
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Feb. 28, 2014
Subsequent Event [Member]
Convertible Senior Notes [Member]
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Feb. 03, 2014
Subsequent Event [Member]
Convertible Senior Notes [Member]
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Mar. 31, 2014
Subsequent Event [Member]
Convertible Notes [Member]
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| Subsequent Event [Line Items] | |||||||||||||||||||
| Share repurchase transaction, authorized amount | $ 1,000,000,000 | $ 1,000,000,000 | $ 300,000,000 | $ 1,000,000,000 | $ 1,500,000,000 | ||||||||||||||
| Remaining available balance for repurchase program | 652,600,000 | ||||||||||||||||||
| Dividend declaration date | Feb. 21, 2012 | May 02, 2011 | Aug. 02, 2010 | Feb. 18, 2014 | |||||||||||||||
| Dividend declared per common share | $ 0.30 | $ 0.20 | $ 0.13 | $ 0.10 | $ 1.20 | $ 1.20 | $ 0.73 | $ 0.30 | |||||||||||
| Dividend date of record | Mar. 04, 2014 | ||||||||||||||||||
| Dividend payment date | Mar. 18, 2014 | ||||||||||||||||||
| Aggregate principal amount of convertible senior notes issued | 1,000,000,000 | ||||||||||||||||||
| Additional principal amount of convertible notes | 150,000,000 | ||||||||||||||||||
| Convertible notes, interest rate | 2.00% | ||||||||||||||||||
| Convertible notes maturity | Aug. 15, 2019 | ||||||||||||||||||
| Total principal amount of convertible notes | 1,150,000,000 | ||||||||||||||||||
| Convertible notes initial conversion rate | 11.5908 | ||||||||||||||||||
| Principal amount of convertible notes | 1,000 | ||||||||||||||||||
| Convertible notes initial conversion price | $ 86.28 | ||||||||||||||||||
| Initial conversion premium above stock price | 25.00% | ||||||||||||||||||
| Common stock sale price per share | $ 69.02 | ||||||||||||||||||
| Direct issuance costs | 26,000,000 | ||||||||||||||||||
| Aggregate principal amount of convertible senior notes | 1,150,000,000 | ||||||||||||||||||
| Capped call transactions with financial institutions | 593,700,000 | 610,100,000 | 124,000,000 | ||||||||||||||||
| Capped call transactions price per common share | 120.79 | ||||||||||||||||||
| Premium percentage over stock price | 75.00% | ||||||||||||||||||
| Decrease in additional paid-in capital | 124,000,000 | ||||||||||||||||||
| Forward share repurchase transactions amount | $ 686,000,000 | ||||||||||||||||||
| Share repurchase transaction, shares to be purchased | 9.9 | ||||||||||||||||||
| Maturity date of convertible notes | August 15, 2019 | ||||||||||||||||||
| Applicable margin payable, percentage | 0.50% | ||||||||||||||||||
| Consolidated leverage ratio | 250.00% | ||||||||||||||||||