Schedule II Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2019

SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]

Schedule II - Valuation and Qualifying Accounts

Comcast Corporation

Schedule II – Valuation and Qualifying Accounts

Year ended December 31, 2019, 2018 and 2017

Year ended December 31 (in millions)	Balance at Beginning of Year		Additions Charged to Costs and Expenses		Deductions from Reserves		Balance at End of Year
2019
Allowance for doubtful accounts	$	352	$	769	$	702	$	419
Valuation allowance on deferred tax assets	632		1,403		129		1,906
2018
Allowance for doubtful accounts	$	288	$	616	$	552	$	352
Valuation allowance on deferred tax assets	377		367		112		632
2017
Allowance for doubtful accounts	$	250	$	554	$	516	$	288
Valuation allowance on deferred tax assets	266		111		—		377

NBCUniversal Media LLC [Member]

SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]

Schedule II - Valuation and Qualifying Accounts

NBCUniversal Media, LLC

Schedule II – Valuation and Qualifying Accounts

Year ended December 31, 2019, 2018 and 2017

Year ended December 31 (in millions)	Balance at Beginning of Year		Additions Charged to Costs and Expenses		Deductions from Reserves		Balance at End of Year
2019
Allowance for doubtful accounts	$	99	$	48	$	47	$	100
Valuation allowance on deferred tax assets	73		36		15		94
2018
Allowance for doubtful accounts	$	88	$	32	$	21	$	99
Valuation allowance on deferred tax assets	87		13		27		73
2017
Allowance for doubtful accounts	$	84	$	23	$	19	$	88
Valuation allowance on deferred tax assets	72		15		—		87