Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Summary of the fair value of the Company's derivative contracts
Fair Value Asset	$ 3	$ 15
Derivative liabilities, Fair Value	(8)	(4)
Interest rate swaps [Member] | Other current assets [Member]
Summary of the fair value of the Company's derivative contracts
Fair Value Asset
Interest rate swaps [Member] | Accrued expenses and other current liabilities [Member]
Summary of the fair value of the Company's derivative contracts
Derivative liabilities, Fair Value	(2)	(3)
Foreign currency contracts [Member] | Other current assets [Member]
Summary of the fair value of the Company's derivative contracts
Fair Value Asset	3	10
Foreign currency contracts [Member] | Other non-current assets [Member]
Summary of the fair value of the Company's derivative contracts
Fair Value Asset		5
Foreign currency contracts [Member] | Accrued expenses and other current liabilities [Member]
Summary of the fair value of the Company's derivative contracts
Derivative liabilities, Fair Value	(6)	(1)
Foreign currency contracts [Member] | Other non-current liabilities [Member]
Summary of the fair value of the Company's derivative contracts
Derivative liabilities, Fair Value