Property and Equipment - Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment
Depreciation and amortization expense	$ 1,574	$ 1,477	$ 1,376
Tangible Property and Equipment [Member]
Property, Plant and Equipment
Depreciation and amortization expense	893	838	783
Landfill Airspace [Member]
Property, Plant and Equipment
Depreciation and amortization expense	575	538	497
Property and Equipment [Member]
Property, Plant and Equipment
Depreciation and amortization expense	$ 1,468	$ 1,376	$ 1,280