Financing Agreements - Additional Information (Detail) In Millions, unless otherwise specified				3 Months Ended					1 Months Ended	3 Months Ended			3 Months Ended
	Mar. 31, 2012 Covenant Requirement Green Zone Minimum USD ($)	Mar. 31, 2012 Covenant Requirement Yellow Zone CreditScore	Mar. 31, 2012 Covenant Requirement Yellow Zone Minimum USD ($)	Mar. 31, 2012 Revolving Facility USD ($)	Mar. 31, 2012 Revolving Facility Minimum	Mar. 31, 2012 Revolving Facility Maximum	Mar. 31, 2012 Revolving Facility Letter of Credit	Mar. 31, 2012 Revolving Facility Letter of Credit Maximum USD ($)	Jan. 31, 2011 Senior Notes USD ($)	Mar. 31, 2012 Senior Notes USD ($)	Jan. 31, 2011 Senior Notes Due 2019 USD ($)	Jan. 31, 2011 Senior Notes Due 2021 USD ($)	Mar. 31, 2012 European Receivables Loan Facility USD ($)	Mar. 31, 2012 European Receivables Loan Facility EUR (€)
Debt Instrument [Line Items]
Net proceeds of the offerings									$ 733
Cash and cash equivalents paid for debt extinguishment									127
Senior notes issued											400	350
Senior notes issued, interest rate											6.50%	6.75%
Gross borrowings										750
Weighted-average interest rate on the Senior Notes										662.00%
Interest payment dates										February 15 and August 15 of each year
Current aggregate facility				500				300					100	75
Percentage of applicable commitment fee					0.50%	0.625%
Percentage of fronting fee							0.25%
Utilized letters of credit										73
Borrowing base collateral				470
Available borrowing capacity				397									100
Revolving facility expiration				Feb. 29, 2016									Mar. 31, 2016	Mar. 31, 2016
Borrowings				0									0	0
Pro forma excess borrowing availability	$ 125		$ 75
Fixed charge coverage ratio		1.1
Debt covenants, description				The incurrence-based covenants in the revolving facility permit us to, among other things, (i) issue foreign subsidiary indebtedness, (ii) incur general secured indebtedness and (iii) incur additional unsecured debt so long as the pro forma minimum fixed charge coverage ratio is at least 1.11.0.
Debt covenants, dividend payment conditions				We may also make dividend payments in respect of our common stock as well as certain investments and acquisitions so long as there is (i) at least $125 of pro forma excess borrowing availability or (ii) at least $75 of pro forma excess borrowing availability and the pro forma minimum fixed charge coverage ratio is at least 1.11.0.