Leases (Supplemental Balance Sheet Information Related to Leases) (Details) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease, right-of-use asset		$ 365	$ 387
Total leased assets		422	449
Operating lease, liability, noncurrent		236	256
Lease liability total		434	461
Other Accrued Liabilities [Member]
Leases [Abstract]
Operating lease, liability, current		132	134
Operating lease, liability, current		132	134
Property, Plant and Equipment [Member]
Leases [Abstract]
Finance lease, right-of-use asset	[1]	57	62
Finance lease, right-of-use asset	[1]	57	62
Short-term Debt [Member]
Leases [Abstract]
Finance lease, liability, current		10	10
Finance lease, liability, current		10	10
Other (c)
Leases [Abstract]
Finance lease, liability, noncurrent		56	61
Finance lease, liability, noncurrent		$ 56	$ 61

[1] Finance leases are recorded net of accumulated amortization of $51 million and $43 million at December 31, 2021 and 2020, respectively.