Benefit Plans (Amounts Recognized in the Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Foreign Plan [Member]
AMOUNTS RECOGNIZED ON THE CONSOLIDATED BALANCE SHEETS
Noncurrent assets	$ 0	$ 64
Accrued benefit liability—current	(7)	(6)
Accrued benefit liability—noncurrent	(88)	(65)
Net amount recognized at end of year	(95)	(7)
UNITED STATES
AMOUNTS RECOGNIZED ON THE CONSOLIDATED BALANCE SHEETS
Noncurrent assets	0	0
Accrued benefit liability—current	0	0
Accrued benefit liability—noncurrent	(88)	(92)
Net amount recognized at end of year	$ (88)	$ (92)