Commitments and Contingencies (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Contingencies And Commitments [Line Items]
Maximum self insurance exposure per incident under general liability insurance and workers' compensation insurance programs	$ 5
Per incident base deductible under auto liability insurance program	10
Insurance claims receivable	155	$ 139
Beginning Balance	664	575
Self-insurance expense	240	172
Cash paid and other	(170)	(151)
Other		68
Ending Balance	734	664
Current portion	191	175
Long-term portion	$ 543	489
Expected time period in years for cash settlement of recorded obligations associated with insurance liabilities	6 years
Revolving Credit Facility [Member]
Contingencies And Commitments [Line Items]
Credit Facility, aggregate capacity	$ 3,500
Advanced Disposal [Member]
Contingencies And Commitments [Line Items]
Other		$ 68