Commitments and Contingencies (Schedule of Commitments) (Details) $ in Millions	Jun. 30, 2019 USD ($)
Long-term Debt, Fiscal Year Maturity [Abstract]
Total borrowings	$ 6,800
Borrowings, due 1 year or less	0
Borrowings, due 2-3 years	750
Borrowings, due 4-5 years	1,250
Borrowings, due after 5 years	4,800
Contractual Obligation, Fiscal Year Maturity [Abstract]
Total commitments, borrowings and contractual obligations	40,578
Total commitments, borrowings and contractual obligations, due 1 year or less	4,892
Total commitments, borrowings and contractual obligations, due 2-3 years	14,803
Total commitments, borrowings and contractual obligations, due 4-5 years	5,920
Total commitments, borrowings and contractual obligations, due after 5 years	14,963
Other Commitment, Fiscal Year Maturity [Abstract]
Total other commitments and contractual obligations	710
Other commitments and contractual obligations, due 1 year or less	204
Other commitments and contractual obligations, due 2-3 years	287
Other commitments and contractual obligations, due 4-5 years	106
Other commitments and contractual obligations, due after 5 years	113
Sports Programming Rights
Contractual Obligation, Fiscal Year Maturity [Abstract]
Total commitments, borrowings and contractual obligations	31,444
Total commitments, borrowings and contractual obligations, due 1 year or less	3,975
Total commitments, borrowings and contractual obligations, due 2-3 years	13,246
Total commitments, borrowings and contractual obligations, due 4-5 years	4,363
Total commitments, borrowings and contractual obligations, due after 5 years	9,860
Entertainment Programming Rights
Contractual Obligation, Fiscal Year Maturity [Abstract]
Total commitments, borrowings and contractual obligations	820
Total commitments, borrowings and contractual obligations, due 1 year or less	555
Total commitments, borrowings and contractual obligations, due 2-3 years	223
Total commitments, borrowings and contractual obligations, due 4-5 years	42
Total commitments, borrowings and contractual obligations, due after 5 years	0
Land and Buildings
Operating Leases, Fiscal Year Maturity [Abstract]
Total operating leases	725
Operating leases, due 1 year or less	139
Operating leases, due 2-3 years	260
Operating leases, due 4-5 years	147
Operating leases, due after 5 years	179
Other
Operating Leases, Fiscal Year Maturity [Abstract]
Total operating leases	79
Operating leases, due 1 year or less	19
Operating leases, due 2-3 years	37
Operating leases, due 4-5 years	12
Operating leases, due after 5 years	$ 11