Restructuring Charges (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 13, 2019	Dec. 31, 2021	Dec. 31, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 0	$ 189	$ 0	$ 206
Severance and Other Restructuring Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Translation and Other Adjustment	0	(25)	6	18
Restructuring and Related Cost, Incurred Cost	0	152	0	142
Payments for Restructuring	0	120	30	137
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs	0	53	0	132
Impaired Assets to be Disposed of by Method Other than Sale, Asset Name [Domain]
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs	$ 0	$ 13	$ 0	$ 40