Derivatives and Fair Value of Financial Instruments-Deferred Comp Securities (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Mar. 28, 2020	Sep. 26, 2020	Sep. 28, 2019	Dec. 31, 2019
Assets:
Trading securities		$ 1,245		$ 1,434
Investments
Amount invested		41	$ 14
Financial services company
Investments
Amount invested	$ 30
Commodities
Assets:
Derivative assets and liabilities, net basis		19		15
Domestic equity securities
Assets:
Trading securities		613		706
Domestic debt securities
Assets:
Trading securities		391		409
Foreign equity securities
Assets:
Trading securities		107		189
High yield securities
Assets:
Trading securities		55		56
Money market funds held in trading accounts
Assets:
Trading securities		2		12
Collateralized loan obligations
Assets:
Trading securities		16		15
Other trading securities
Assets:
Trading securities		4		4
Recurring basis | Level 1
Assets:
Total assets		894		1,095
Liabilities:
Total liabilities		15		4
Recurring basis | Level 1 | Commodities
Assets:
Derivatives		16		6
Liabilities:
Derivatives		15		4
Recurring basis | Level 1 | Domestic equity securities | Short-term investments
Assets:
Trading securities		613		706
Recurring basis | Level 1 | Domestic equity securities | Other current assets
Assets:
Trading securities		12		40
Recurring basis | Level 1 | Domestic debt securities | Short-term investments
Assets:
Trading securities		122		117
Recurring basis | Level 1 | Foreign equity securities | Short-term investments
Assets:
Trading securities		107		189
Recurring basis | Level 1 | Foreign equity securities | Other current assets
Assets:
Trading securities		3		3
Recurring basis | Level 1 | High yield securities | Short-term investments
Assets:
Trading securities		7		10
Recurring basis | Level 1 | Money market funds held in trading accounts | Short-term investments
Assets:
Trading securities		2		12
Recurring basis | Level 1 | Money market funds held in trading accounts | Other current assets
Assets:
Trading securities		6		6
Recurring basis | Level 1 | Other trading securities | Short-term investments
Assets:
Trading securities		4		4
Recurring basis | Level 1 | Fixed income securities | Other current assets
Assets:
Trading securities		2		2
Recurring basis | Level 2
Assets:
Total assets		394		396
Liabilities:
Total liabilities		5		3
Recurring basis | Level 2 | Interest rate swaps
Liabilities:
Derivatives		1
Recurring basis | Level 2 | Foreign currencies
Assets:
Derivatives		4
Liabilities:
Derivatives		4		3
Recurring basis | Level 2 | Domestic debt securities | Short-term investments
Assets:
Trading securities		269		292
Recurring basis | Level 2 | Foreign debt securities | Short-term investments
Assets:
Trading securities		57		43
Recurring basis | Level 2 | High yield securities | Short-term investments
Assets:
Trading securities		48		46
Recurring basis | Level 2 | Collateralized loan obligations | Short-term investments
Assets:
Trading securities		16		15
Recurring basis | Level 3
Assets:
Total assets		31
Liabilities:
Contingent consideration		15		13
Total liabilities		15		13
Recurring basis | Level 3 | Long-term investments
Assets:
Long-term equity investment		31
Recurring basis | Fair Value
Assets:
Total assets		1,319		1,491
Liabilities:
Contingent consideration		15		13
Total liabilities		35		20
Recurring basis | Fair Value | Commodities
Assets:
Derivatives		16		6
Liabilities:
Derivatives		15		4
Recurring basis | Fair Value | Interest rate swaps
Liabilities:
Derivatives		1
Recurring basis | Fair Value | Foreign currencies
Assets:
Derivatives		4
Liabilities:
Derivatives		4		3
Recurring basis | Fair Value | Long-term investments
Assets:
Long-term equity investment		31
Recurring basis | Fair Value | Domestic equity securities | Short-term investments
Assets:
Trading securities		613		706
Recurring basis | Fair Value | Domestic equity securities | Other current assets
Assets:
Trading securities		12		40
Recurring basis | Fair Value | Domestic debt securities | Short-term investments
Assets:
Trading securities		391		409
Recurring basis | Fair Value | Foreign equity securities | Short-term investments
Assets:
Trading securities		107		189
Recurring basis | Fair Value | Foreign equity securities | Other current assets
Assets:
Trading securities		3		3
Recurring basis | Fair Value | Foreign debt securities | Short-term investments
Assets:
Trading securities		57		43
Recurring basis | Fair Value | High yield securities | Short-term investments
Assets:
Trading securities		55		56
Recurring basis | Fair Value | Money market funds held in trading accounts | Short-term investments
Assets:
Trading securities		2		12
Recurring basis | Fair Value | Money market funds held in trading accounts | Other current assets
Assets:
Trading securities		6		6
Recurring basis | Fair Value | Collateralized loan obligations | Short-term investments
Assets:
Trading securities		16		15
Recurring basis | Fair Value | Other trading securities | Short-term investments
Assets:
Trading securities		4		4
Recurring basis | Fair Value | Fixed income securities | Other current assets
Assets:
Trading securities		$ 2		$ 2