Income Taxes(Components Of Deferred Income Taxes) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets relating to:
Accrued expenses	$ 379	$ 511
Bad debt reserves	301	246
Insurance reserves	147	156
Lease liabilities	200	216
Retirement liabilities	173	170
Deferred compensation	34	35
Federal and state operating loss carryforwards	208	201
Deferred Tax Assets, Investments	340	0
Other	267	207
Total deferred tax assets	2,049	1,742
Deferred Tax Assets, Valuation Allowance	(203)	(212)
Deferred Tax Assets, Net of Valuation Allowance	1,846	1,530
Deferred tax liabilities relating to:
Federal and state intangible assets	2,059	2,071
Non-U.S intangible assets	380	452
Capitalized software	601	777
Depreciation and amortization	62	45
Investments basis	0	295
Retirement assets	317	314
Lease right-of-use assets	123	126
Prepaid expenses	201	152
Total deferred tax liabilities	3,743	4,232
Deferred Tax Liabilities, Net	$ 1,897	$ 2,702