Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended		15 Months Ended
	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2020
Income Tax [Line Items]
Income taxes	$ 243		$ 151	$ 659	$ 431
Effective income tax rate	20.00%		19.00%	21.00%	21.00%
Favorable net discrete items, percentage impact	2.00%		3.00%	2.00%	1.00%
Unfavorable discrete items, percentage impact				1.00%
Payroll tax deferral from CARES Act through December 2020						$ 73
Payroll Taxes Paid		$ 37