Divestitures, Discontinued Operations and Impairment of Long-Lived Assets - Assets and Liabilities of Disposal Group Held for Sale (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Disposal Group, Cash and cash equivalents		$ 27
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)