Acquisitions and Divestitures (Detail) $ / shares in Units, customer in Millions, $ in Millions		12 Months Ended
	Oct. 30, 2020 USD ($) customer $ / shares	Dec. 31, 2022 USD ($) item	Dec. 31, 2021 USD ($) item	Dec. 31, 2020 USD ($) item	Nov. 30, 2020 USD ($)
Business Acquisition
Non-cash acquisition consideration		$ 135
Contingent consideration paid for acquisitions closed in previous year		5		$ 3
Operating revenues		19,698	$ 17,931	15,218
Operating		12,294	11,111	9,341
Selling, general and administrative		$ 1,938	$ 1,864	$ 1,728
364-day revolving credit facility [Member]
Business Acquisition
Maximum capacity					$ 3,000
Senior Notes, Aggregate [Member]
Business Acquisition
Debt instrument face amount					$ 2,500
2022 Business Acquisitions [Member]
Business Acquisition
Number of business acquired | item		13
Total consideration, net of cash acquired		$ 507
Business acquisitions cash payments		372
Non-cash acquisition consideration		135
Promissory notes receivable converted into equity		67
2021 Business Acquisitions [Member]
Business Acquisition
Number of business acquired | item			11
Total consideration, net of cash acquired			$ 94
Business acquisitions cash payments			73
Other consideration			21
Payments made for contingent consideration			3
2020 Business Acquisitions [Member]
Business Acquisition
Number of business acquired | item				4
Cash acquired from acquisitions				$ 36
Total consideration, net of cash acquired				4,100
Advanced Disposal [Member]
Business Acquisition
Price per share | $ / shares	$ 30.30
Total consideration, net of cash acquired	$ 4,600
Debt incurred for acquisition	$ 1,800
Number of customers | customer	3
Business acquisition costs incurred		$ 10	$ 51	156
Operating revenues				205
Operating				142
Selling, general and administrative				$ 60