Debt - Additional Information (Detail)	12 Months Ended			1 Months Ended				1 Months Ended				12 Months Ended			12 Months Ended		1 Months Ended		12 Months Ended	1 Months Ended			1 Months Ended						12 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2012 USD ($)	May 31, 2013 8% Senior Notes Due 2016 USD ($)	Mar. 31, 2013 8% Senior Notes Due 2016 USD ($)	Dec. 31, 2013 8% Senior Notes Due 2016	Dec. 31, 2012 8% Senior Notes Due 2016	Sep. 30, 2013 1 1/2% Senior Subordinated Convertible Notes due 2019 USD ($)	Jun. 30, 2013 1 1/2% Senior Subordinated Convertible Notes due 2019 USD ($)	Dec. 31, 2013 1 1/2% Senior Subordinated Convertible Notes due 2019	Dec. 31, 2012 1 1/2% Senior Subordinated Convertible Notes due 2019	Dec. 31, 2013 7 1/2% Senior Subordinated Notes Due 2020	Dec. 31, 2012 7 1/2% Senior Subordinated Notes Due 2020	Dec. 31, 2013 7 1/2% Senior Subordinated Notes Due 2020 Euro-Denominated EUR (€)	Dec. 31, 2013 6 1/8% Senior Notes Due 2022	Dec. 31, 2012 6 1/8% Senior Notes Due 2022	Dec. 31, 2013 1 7/8% Senior Subordinated Convertible Notes due 2018 USD ($)	Dec. 31, 2012 1 7/8% Senior Subordinated Convertible Notes due 2018	Dec. 31, 2013 Securitization Facility USD ($)	Oct. 31, 2013 Senior Secured Term Loan B1 Tranche USD ($)	Dec. 31, 2013 Senior Secured Term Loan B1 Tranche USD ($)	Oct. 31, 2013 Senior Secured Term Loan B1 Tranche Libor Plus	Mar. 31, 2013 Senior Secured Term Loan A1 Tranche USD ($)	Dec. 31, 2013 Senior Secured Term Loan A1 Tranche USD ($)	Dec. 31, 2013 Senior Secured Term Loan A Facility USD ($)	Dec. 31, 2013 Senior Secured Term Loan B Facility USD ($)	Mar. 31, 2013 Senior Secured Term Loan B Facility	Dec. 31, 2013 Senior Secured Term Loan B Facility 8% Senior Notes Due 2016	Dec. 31, 2013 Senior Secured Revolving Credit Facility USD ($)	Dec. 31, 2013 Senior Secured Revolving Credit Facility U.S. Dollar Component USD ($)	Dec. 31, 2013 Senior Secured Revolving Credit Facility Multi-Currency Component USD ($)
Debt Instrument [Line Items]
Additional borrowing under the credit facility																				$ 750,000,000			$ 250,000,000
Debt instrument maturity Year																			2016-10	2020-09			2018-03		2016-03		2018-03		2016-03
Basis spread on variable rate																			0.80%			2.75%
Interest rate of debt instrument						8.00%	8.00%			1.50%	1.50%	7.50%	7.50%		6.125%	6.125%	1.875%	1.875%										8.00%
Debt instrument maturity year						2016	2016			2019	2019	2020	2020		2022	2022	2018	2018										2016
Amount borrowed	4,859,600,000																				750,000,000			250,000,000	675,000,000	650,000,000
Borrowing under the credit facility																			500,000,000										250,000,000	175,000,000	75,000,000
Annual commitment fee percentage on unused portion of credit facility																													0.38%
Weighted average interest rate on facility	2.50%
Debt instrument repurchased aggregate principal amount				132,000,000	168,000,000
Debt instrument aggregate principal amount repurchased consideration				137,000,000	176,000,000
Debt instrument, redemption prices range percentage, minimum												100.00%			100.00%
Debt instrument, redemption prices range percentage, maximum												104.00%			103.00%
Debt instrument, aggregate principal balance designated as investment hedge														150,000,000
Private offering senior subordinated convertible notes, aggregate principal amount									265,000,000
Net proceeds after deducting fees and expenses									259,000,000
Conversion rate for common stock									17.1								21
Convertible note, conversion price per share									$ 58.46								$ 47.23
Principal amount of convertible notes in to shares common stock								1,000	1,000								1,000
Convertible Notes, repurchase rate									100.00%								100.00%
Percentage by which closing sale price is more than current conversion price to be convertible								130.00%
Number of trading days								20 days
Number of Consecutive trading days								30 days
Number Of Trading Days								60 days
Number of Consecutive trading days								10 days
Percentage that distribution has per share value exceeding closing sale price of common stock								10.00%
Percentage of closing sale price in excess of convertible notes								98.00%
Trading-day period								10 days
Convertible Debt Initial Liability Component								214,000,000
Convertible Debt Equity Component								51,000,000
Effective interest rate								5.60%									5.50%
Unused line fee for securitization facility																			0.40%
Unamortized deferred debt issue costs	47,300,000		48,000,000
Loss on the extinguishment of debt	$ 25,900,000	$ 12,800,000