Summary of Significant Accounting Policies - Additional Information (Details)		1 Months Ended		3 Months Ended								12 Months Ended
	Feb. 28, 2020 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2018 USD ($)	Jan. 02, 2021 USD ($)	Sep. 26, 2020 USD ($)	Jun. 27, 2020 USD ($) segment	Mar. 28, 2020 USD ($)	Dec. 28, 2019 USD ($)	Sep. 28, 2019 USD ($)	Jun. 29, 2019 USD ($)	Mar. 30, 2019 USD ($)	Jan. 02, 2021 USD ($) segment_component segment	Dec. 28, 2019 USD ($)	Dec. 29, 2018 USD ($)	Jan. 30, 2018 USD ($)	Dec. 30, 2017 USD ($)	Jul. 31, 2017 USD ($)
Significant Accounting Policies [Line Items]
Additional revenue, impact of additional week in fiscal year												$ 19,400,000
Additional operating income, impact of additional week in fiscal year												3,900,000
Number of reporting segments | segment						2
Accounts payable and accrued liabilities				$ 387,700,000				$ 370,600,000				387,700,000	$ 370,600,000
Other long-term liabilities				67,800,000				58,700,000				67,800,000	58,700,000
Goodwill and intangible asset impairment charges				0	$ 0	$ 115,200,000	$ 0					115,200,000	0	$ 0
Cost of sales				223,200,000	213,400,000	202,100,000	200,900,000	179,800,000	$ 185,800,000	$ 184,000,000.0	$ 184,600,000	839,600,000	734,200,000	767,400,000
Advertising costs												$ 21,200,000	22,500,000	23,000,000.0
Share-based compensation award vesting period												3 years
Number of operating segments | segment												2
Percentage of weight to income approach												50.00%
Goodwill impairment												$ 104,100,000
Goodwill				1,284,300,000				1,047,500,000				1,284,300,000	1,047,500,000	1,026,100,000
Intangible assets subject to amortization, net of accumulated amortization				532,100,000				309,900,000				532,100,000	309,900,000
Acquired rights				455,500,000				287,100,000				455,500,000	287,100,000
Loss on disposal of property, plant and equipment, net				4,400,000	$ 2,300,000	$ 2,500,000	$ 1,400,000	2,900,000	$ 1,100,000	$ 1,700,000	$ 1,900,000	10,600,000	7,600,000	8,700,000
Cumulative effect adjustment				1,346,900,000				1,166,200,000				1,346,900,000	1,166,200,000	1,170,400,000		$ 885,700,000
Retained Earnings (Accumulated deficit)
Significant Accounting Policies [Line Items]
Cumulative effect adjustment				81,100,000				265,000,000.0				81,100,000	265,000,000.0	298,800,000		$ (12,200,000)
Cumulative effect of changes in accounting principle, net of taxes
Significant Accounting Policies [Line Items]
Cumulative effect adjustment								(3,600,000)					(3,600,000)	10,500,000
Cumulative effect of changes in accounting principle, net of taxes | Retained Earnings (Accumulated deficit)
Significant Accounting Policies [Line Items]
Cumulative effect adjustment								(3,600,000)					(3,600,000)	10,500,000
Trademarks
Significant Accounting Policies [Line Items]
Acquired rights				455,500,000				287,100,000				455,500,000	287,100,000
Customer relationships
Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, net of accumulated amortization				485,200,000				267,400,000				485,200,000	267,400,000
Software
Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, net of accumulated amortization				24,300,000				21,400,000				24,300,000	21,400,000
Patents
Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, net of accumulated amortization				12,800,000				$ 11,200,000				12,800,000	11,200,000
Eden Reporting Unit
Significant Accounting Policies [Line Items]
Goodwill				246,300,000								246,300,000
Aimia Reporting Unit
Significant Accounting Policies [Line Items]
Goodwill				54,600,000								54,600,000
Decantae Reporting Unit
Significant Accounting Policies [Line Items]
Goodwill				1,300,000								1,300,000
DSSAqua, Mountain Valley, Eden, Aimia, and Decantae Reporting Units
Significant Accounting Policies [Line Items]
Goodwill				1,284,300,000								1,284,300,000
DSSAqua Reporting Unit
Significant Accounting Policies [Line Items]
Goodwill				966,100,000								966,100,000
Mountain Valley
Significant Accounting Policies [Line Items]
Goodwill				$ 16,000,000.0								$ 16,000,000.0
North America
Significant Accounting Policies [Line Items]
Number of segment components | segment_component												3
Rest of World
Significant Accounting Policies [Line Items]
Number of segment components | segment_component												4
Rest of World | Aimia Reporting Unit
Significant Accounting Policies [Line Items]
Percentage of fair value exceeding carrying value of reporting units						23.50%
Rest of World | Measurement Input, Weighted Average Terminal Growth Rate | Eden Reporting Unit
Significant Accounting Policies [Line Items]
Reporting unit, measurement input				0.015								0.015
Rest of World | Measurement Input, Weighted Average Terminal Growth Rate | Aimia Reporting Unit
Significant Accounting Policies [Line Items]
Reporting unit, measurement input				0.020								0.020
Rest of World | Measurement Input, Weighted Average Terminal Growth Rate | Decantae Reporting Unit
Significant Accounting Policies [Line Items]
Reporting unit, measurement input				0.020								0.020
Rest of World | Measurement Input, Weighted Average Terminal Growth Rate | Farrers Reporting Unit
Significant Accounting Policies [Line Items]
Reporting unit, measurement input				0.020								0.020
Rest of World | Measurement Input, Discount Rate | Eden Reporting Unit
Significant Accounting Policies [Line Items]
Reporting unit, measurement input				0.095								0.095
Rest of World | Measurement Input, Discount Rate | Aimia Reporting Unit
Significant Accounting Policies [Line Items]
Reporting unit, measurement input				0.115								0.115
Rest of World | Measurement Input, Discount Rate | Decantae Reporting Unit
Significant Accounting Policies [Line Items]
Reporting unit, measurement input				0.115								0.115
Rest of World | Measurement Input, Discount Rate | Farrers Reporting Unit
Significant Accounting Policies [Line Items]
Reporting unit, measurement input				0.115								0.115
Shipping and Handling | Selling, General and Administrative Expenses | North America and Rest of World Segments
Significant Accounting Policies [Line Items]
Cost of sales												$ 441,400,000	$ 479,300,000	$ 461,700,000
COVID-19 Pandemic
Significant Accounting Policies [Line Items]
Wage subsidies received												7,400,000
Accounts payable and accrued liabilities				$ 9,000,000.0								9,000,000.0
Other long-term liabilities				7,500,000								7,500,000
Goodwill and intangible asset impairment charges												115,200,000
COVID-19 Pandemic | Eden Reporting Unit | Trademarks
Significant Accounting Policies [Line Items]
Indefinite-lived intangible asset impairment												9,900,000
COVID-19 Pandemic | Aquaterra Reporting Unit | Trademarks
Significant Accounting Policies [Line Items]
Indefinite-lived intangible asset impairment												1,200,000
COVID-19 Pandemic | Rest of World | Eden Reporting Unit
Significant Accounting Policies [Line Items]
Goodwill impairment												103,300,000
COVID-19 Pandemic | Rest of World | Aimia Reporting Unit
Significant Accounting Policies [Line Items]
Goodwill impairment						$ 0
COVID-19 Pandemic | Rest of World | Decantae Reporting Unit
Significant Accounting Policies [Line Items]
Goodwill impairment												300,000
COVID-19 Pandemic | Rest of World | Farrers Reporting Unit
Significant Accounting Policies [Line Items]
Goodwill impairment												500,000
COVID-19 Pandemic | Employee Severance
Significant Accounting Policies [Line Items]
Restructuring charge, expected to incur				$ 19,000,000.0								$ 19,000,000.0
Discontinued Operations, Disposed of by Sale | S&D Disposition
Significant Accounting Policies [Line Items]
Purchase price received, cash	$ 405,000,000.0
Payments, post-closing working capital adjustments		$ 1,500,000
Discontinued Operations, Disposed of by Sale | Traditional CSD and Juice Business
Significant Accounting Policies [Line Items]
Purchase price received, cash			$ 7,900,000
Aggregate deal consideration															$ 1,250,000,000		$ 1,250,000,000