Revenues (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Retained Earnings (Accumulated Deficit)	$ 967	$ 841
Revenue recognized	$ 66	$ 70
Scenario, Adjustment [Member] \| Impact of adopting ASC 606 [Member]
Disaggregation of Revenue [Line Items]
Retained Earnings (Accumulated Deficit)			$ 3

The cumulative amount of the reporting entity's undistributed earnings or deficit.

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