(Impact of Derivative Instruments in Consolidated Balance Sheet Other) (Details) - USD ($) $ in Millions	Dec. 31, 2019		Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Derivative assets	$ 68	[1]	$ 19	[2]
Derivative liabilities	7	[3]	15	[4]
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	14		2
Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	54		$ 17
Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	6
Other Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 1

[1] Includes $14 million recorded in Other current assets and $54 million recorded in Deferred charges and other assets in the accompanying consolidated balance sheet.

[2] Included $2 million recorded in Other current assets and $17 million Deferred charges recorded in the accompanying consolidated balance sheet.

[3] Included $6 million recorded in Other accrued liabilities and $1 million recorded in Other liabilities the accompanying consolidated balance sheet.

[4] Included in Other accrued liabilities in the accompanying consolidated balance sheet.