Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Income taxes
Effective tax rate on income from continuing operations (as a percent)	21.80%		20.50%	20.50%	19.70%
Valuation allowance, deferred tax assets	$ 68			$ 68		$ 65
Gross unrecognized tax benefits	137			137		138
Unrecognized tax benefits, net of federal tax benefits, that would affect the effective tax rate if recognized	109			109		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	26			26
Increase (decrease) in interest and penalties	2		$ 0	10	$ 2
Payable related to accrued interest and penalties	24			24		$ 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	37			37
State
Income taxes
Deferred tax assets, loss carryforwards	30			30
Foreign
Income taxes
Deferred tax assets, loss carryforwards	$ 37			$ 37