Leases, Codification Topic 842 (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Operating Lease, Cost	$ 380	$ 360
Variable Lease, Cost	73	71
Operating Lease, Payments	301	299
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	443	$ 371
Lessee, Operating Lease, Lease Not yet Commenced, Value	$ 265
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract	7 years
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract	25 years