Disposal Groups, Discontinued Operations and Impairment of Long-Lived Assets - Disposal Group Held for Sale (Details) $ in Millions	Dec. 31, 2014 USD ($)
Disposal Group, Current assets classified as held for sale	$ 27
Disposal Group, Current liabilities classified as held for sale	21
Disposal Group, Noncurrent liabilities classified as held for sale	17
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Operations In Venezuela [Member]
Disposal Group, Cash and cash equivalents	27
Disposal Group, Accounts payable	16
Disposal Group, Accrued payroll and employee benefits	4
Disposal Group, Other accrued liabilities	1
Disposal Group, Pension obligations	11
Disposal Group, Other noncurrent liabilities	6
Disposal Group, Accumulated other comprehensive loss classified as held for sale	$ (11)