Fair Value Measurements (Major Categories of Financial Assets and Liabilities Measured on a Recurring Basis) (Details) - USD ($) $ in Millions		Sep. 30, 2019		Dec. 31, 2018
Other Current Assets [Member]
Other assets	[1]	$ 141		$ 103
Other Current Assets [Member] | Significant Other Observable Inputs (Level 2) [Member]
Other assets	[1]	141		103
Investments [Member]
Investments	[2]			16
Investments [Member] | Significant Unobservable Inputs (Level 3) [Member]
Investments	[2]			16
Contingent consideration				16
Other Noncurrent Assets [Member]
Other assets	[1]	96	[3]	45
Other Noncurrent Assets [Member] | Significant Other Observable Inputs (Level 2) [Member]
Other assets	[1]	75	[3]	45
Other Noncurrent Assets [Member] | Significant Unobservable Inputs (Level 3) [Member]
Other assets	[1],[3]	21
Other Accrued Liabilities [Member]
Other accrued liabilities	[1]	129		56
Other Accrued Liabilities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Other accrued liabilities	[1]	129		56
Other Liabilities [Member]
Other liabilities	[1]	271		406	[4]
Other Liabilities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Other liabilities	[1]	271		386	[4]
Other Liabilities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Other liabilities	[1],[4]			20
Contingent consideration				$ 20
Renewable Energy [Member] | Other Noncurrent Assets [Member]
Other assets		$ 21

[1] Fair value measurements at reporting date using Quoted prices in Significant other Significant active markets for observable unobservable September 30, identical assets inputs inputs 2019 (Level 1) (Level 2) (Level 3) Current assets: Other current assets (1) $ 141 $ 141 Non-current assets: Other assets (1)(2) $ 96 $ 75 $ 21 Current liabilities: Other accrued liabilities (1) $ 129 $ 129 Non-current liabilities: Other liabilities (1) $ 271 $ 271 (1)Derivative assets and liabilities include foreign exchange contracts which are measured using observable inputs for similar assets and liabilities.

[2] One of the Company’s equity securities was measured using unobservable (Level 3) inputs, in the amount of $16 million.

[3] Other assets include one of the Company’s renewable energy derivative contracts that was measured using unobservable (Level 3) inputs, in the amount of $21 million.

[4] Other liabilities include contingent consideration that was measured using unobservable (Level 3) inputs, in the amount of $20 million.