Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018
Income Tax Disclosure [Abstract]
Earnings before income taxes	$ 3,627	$ 4,316	[1]	$ 4,304	[1]
Additional income tax benefit	30	77		62
Unrecognized tax benefits	16	13		12
Amount of unrecognized tax benefits that could favorably impact effective income tax rate	$ 13	$ 10		$ 9

[1] Certain prior year data has been reclassified to conform to the current presentation.