XML 112 R98.htm IDEA: XBRL DOCUMENT v3.22.0.1
Income Taxes (Summary of Activities Related to Unrecognized Tax Benefits) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Beginning balance $ 26 $ 29 $ 28
Increases related to tax positions taken during a prior period 2 0 1
Increases related to tax positions taken during the current period 2 2 4
Decreases related to settlements with taxing authorities 0 0 (1)
Decreases related to tax positions taken during a prior period 0 (2) (1)
Decreases as a result of a lapse of the applicable statute of limitations (3) (3) (2)
Ending balance $ 27 $ 26 $ 29