Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Effective tax rate from continuing operations	13.20%	31.70%	1.10%	24.30%
Unrecognized Tax Benefits	$ 277		$ 277		$ 261
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	195		195		$ 183
Decrease in Unrecognized Tax Benefits is Reasonably Possible	23		23
The CARES Act	$ 2,200,000		$ 2,200,000