Commitments and Contingencies (Details) R$ in Millions, ₨ in Billions				3 Months Ended									6 Months Ended	12 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2017 BRL (R$)	Apr. 01, 2015	Dec. 31, 2019 USD ($) claim	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 USD ($) claim	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 INR (₨) claim
Loss Contingencies [Line Items]
Provision for income taxes				$ (230,000,000)	$ 633,000,000	$ (216,000,000)	$ (189,000,000)	$ (111,000,000)	$ (310,000,000)	$ (15,000,000)	$ (337,000,000)			$ (2,000,000)	$ (773,000,000)	$ (666,000,000)
Selling, general and administrative expenses to offset tax benefit														6,136,000,000	$ 6,475,000,000	5,938,000,000
Contingency provision accruals	$ 212,000,000	R$ 667
Income due to reversal of accrued liability under tax indemnity												$ 58,000,000
Selling, general and administrative expenses
Loss Contingencies [Line Items]
Contingency provision accruals	153,000,000
Income due to reversal of accrued liability under tax indemnity												46,000,000
Interest and other expense, net
Loss Contingencies [Line Items]
Contingency provision accruals	$ 59,000,000															$ 59,000,000
Income due to reversal of accrued liability under tax indemnity												$ 12,000,000
Selling, general and administrative expenses and interest and other expense, net
Loss Contingencies [Line Items]
Income due to reversal of accrued liability under tax indemnity													$ 4,000,000
Groupe Danone S.A.Global LU Biscuit Business LU Biscuit
Loss Contingencies [Line Items]
Provision for income taxes										15,000,000
Selling, general and administrative expenses to offset tax benefit										11,000,000
Interest and other expense to offset tax benefit										$ 4,000,000
Indian Department of Central Excise Authority | Cadbury
Loss Contingencies [Line Items]
Amount for formal claim of notice presented for unpaid excise tax, as of the balance sheet date				52,000,000										52,000,000			₨ 3.7
Indian Department of Central Excise Authority | Cadbury | Show case notice
Loss Contingencies [Line Items]
Amount for formal claim of notice presented for unpaid excise tax, as of the balance sheet date				$ 68,000,000										$ 68,000,000			₨ 4.9
Number of show cause notices | claim				3										3			3
Percentage of principal demand for cases pending adjudication or appeal as of June 30, 2019				50.00%										50.00%			50.00%
Percentage of principal demand for cases where appeal was filed after June 30, 2019				60.00%										60.00%			60.00%
Loss contingency accrual				$ 65,000,000										$ 65,000,000			₨ 4.6
Indian Department of Central Excise Authority | Cadbury | Show case notice | Selling, general and administrative expenses
Loss Contingencies [Line Items]
Net indirect tax expense to recorded as result of resolved tax amnesty				$ 85,000,000
BRAZIL | Selling, general and administrative expenses
Loss Contingencies [Line Items]
Net benefit for legal settlement								$ 26,000,000
U.S. Commodity Futures Trading Commission ("CFTC")
Loss Contingencies [Line Items]
Loss contingency, filling date			Apr. 01, 2015
Loss contingency, damages sought														1,000,000
U.S. Commodity Futures Trading Commission ("CFTC") | Each Additional Violation of the Commodity Exchange Act
Loss Contingencies [Line Items]
Loss contingency, damages sought														$ 140,000