Benefit Plans (Amounts Recognized in the Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
UNITED STATES
AMOUNTS RECOGNIZED ON THE CONSOLIDATED BALANCE SHEETS
Noncurrent assets	$ 49	$ 9
Accrued benefit liability—current	0	0
Accrued benefit liability—noncurrent	(56)	(91)
Net amount recognized at end of year	(7)	(82)
Foreign Plan [Member]
AMOUNTS RECOGNIZED ON THE CONSOLIDATED BALANCE SHEETS
Noncurrent assets	7	0
Accrued benefit liability—current	(7)	(8)
Accrued benefit liability—noncurrent	(67)	(98)
Net amount recognized at end of year	$ (67)	$ (106)