Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Income taxes
Effective tax rate on income from continuing operations (as a percent)	15.90%	18.00%
Valuation allowance, deferred tax assets	$ 65		$ 65
Gross unrecognized tax benefits	143		138
Unrecognized tax benefits, net of federal tax benefits, that would affect the effective tax rate if recognized	110		106
Amount of decrease in unrecognized tax benefits reasonably possible within next 12 months	48
Increase (decrease) in interest and penalties	1	$ 1
Payable related to accrued interest and penalties	15		$ 14
State net operating losses
Income taxes
Valuation allowance, deferred tax assets	29
State deferred tax assets
Income taxes
Valuation allowance, deferred tax assets	2
Foreign net operating losses
Income taxes
Valuation allowance, deferred tax assets	34
State
Income taxes
Deferred tax assets, loss carryforwards	30
Foreign
Income taxes
Deferred tax assets, loss carryforwards	$ 34