Fair Value Measurements (Major Categories of Financial Assets and Liabilities Measured on a Recurring Basis) (Details) - USD ($) $ in Millions		Jun. 30, 2019		Dec. 31, 2018
Other Current Assets [Member]
Other assets	[1]	$ 94		$ 103
Other Current Assets [Member] | Significant Other Observable Inputs (Level 2) [Member]
Other assets	[1]	94		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]	73	[3]	45
Other Noncurrent Assets [Member] | Significant Unobservable Inputs (Level 3) [Member]
Other assets	[1],[3]	23
Other Accrued Liabilities [Member]
Other accrued liabilities	[1]	67		56
Other Accrued Liabilities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Other accrued liabilities	[1]	67		56
Other Liabilities [Member]
Other liabilities		345	[3]	406	[1],[4]
Other Liabilities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Other liabilities		345	[3]	386	[1],[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		$ 23

[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 $23 million.

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