Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Income taxes
Effective tax rate on income from continuing operations (as a percent)	21.10%	20.60%	19.50%	19.10%
Valuation allowance, deferred tax assets	$ 66		$ 66		$ 65
Gross unrecognized tax benefits	132		132		138
Unrecognized tax benefits, net of federal tax benefits, that would affect the effective tax rate if recognized	105		105		106
Additions to unrecognized tax benefits for tax positions of prior years	71
Reductions to unrecognized tax benefits for tax positions of prior years	80
Amount of decrease in unrecognized tax benefits reasonably possible within next 12 months	18		18
Increase (decrease) in interest and penalties	7	$ 1	8	$ 2
Payable related to accrued interest and penalties	22		22		$ 14
State net operating losses
Income taxes
Valuation allowance, deferred tax assets	29		29
State deferred tax assets
Income taxes
Valuation allowance, deferred tax assets	2		2
Foreign net operating losses
Income taxes
Valuation allowance, deferred tax assets	35		35
State
Income taxes
Deferred tax assets, loss carryforwards	30		30
Foreign
Income taxes
Deferred tax assets, loss carryforwards	$ 35		$ 35