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Stockholders' Equity - Additional Information (Detail) - USD ($)			3 Months Ended
	Mar. 21, 2016	Feb. 17, 2016	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015		Jul. 09, 2015	Aug. 31, 2007
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock repurchase program, number of shares authorized to be repurchased								20,000,000
Treasury stock value			$ 1,284,700,000		$ 1,265,700,000	[1]
Common stock in treasury, shares			29,994,199		29,612,337
Dividends declared date	Mar. 21, 2016	Feb. 17, 2016
Dividends declared payable date	Jun. 17, 2016	Mar. 18, 2016
Dividends declared date of record	Jun. 03, 2016	Mar. 04, 2016
Dividends per share on common stock	$ 0.16	$ 0.13
Aggregate dividends declared		$ 26,000,000
Common Stock Repurchase Set Two | Share Trading Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Treasury stock value				$ 44,000,000
Number of common stock shares repurchased				1,014,147
Common Stock Repurchase Set One | Share Trading Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Treasury stock value			$ 32,000,000
Number of common stock shares repurchased			699,345
Accelerated Shares Repurchase Agreement [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Treasury stock value				$ 25,000,000
Common stock in treasury, shares				546,574
Common stock repurchase price per share				$ 45.74
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock repurchase program, authorized amount							$ 1,500,000,000
[1] As of January 1, 2016, we have adopted ASU 2015-03 and ASU 2015-15 with retrospective application. This resulted in a reclassification from other non-current assets to long-term debt, less current portion for debt issuance costs. Refer to Note 2, “Recently Issued Accounting Standards” of the notes to the condensed consolidated financial statements for further details.

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